The Tertiary Phase, Quandary Phase, Quintessential Phase and Hexagonal Phase are respectively the third, fourth, fifth and sixth series of The Hitchhiker's Guide to the Galaxy radio series. Produced in 2003, 2004 and 2018 by Above the Title Productions for BBC Radio 4, they are radio adaptations of the third, fourth, fifth and sixth books in Douglas Adams' The Hitchhiker's Guide to the Galaxy series: Life, the Universe and Everything; So Long, and Thanks For All the Fish; Mostly Harmless and And Another Thing....

These radio series consisted of a total of twenty episodes, following on from the twelve episodes from the original two series (the Primary and Secondary Phases) which originally aired in 1978 and 1980.

The producers chose not to continue the ordinal sequence established by the Primary, Secondary and Tertiary phases. If they had done so, the fourth, fifth and sixth series would have been termed quaternary, quinary and senary. Humorously, they chose "Quandary", which means "dilemma", "Quintessential", which today means "the most perfect example of something" (although the original meaning of quintessential was "fifth element"), and "Hexagonal", which refers to hexagonal phases.

The Tertiary Phase

<!-- Deleted image removed: thumb|right|200px|Front cover of the BBC Audio release of the "Tertiary Phase" (Fits 13-18) of The Hitchhiker's Guide to the Galaxy. -->

The Hitchhiker's Guide to the Galaxy: Tertiary Phase, based on Life, the Universe and Everything, ran on BBC Radio 4 from Tuesday 21 September to 26 October 2004, with repeats on the following Thursdays. Episodes were subtitled "Fit the Thirteenth" through "Fit the Eighteenth". The third novel was adapted by Dirk Maggs, John Langdon and Bruce Hyman following instructions left by Adams. The idea was re-proposed during Tom Baker's tenure in the title role, and again for a potential (but unmade) second television series of The Hitchhiker's Guide to the Galaxy.

Before the final episode was broadcast, BBC Worldwide released the Tertiary Phase on CD, including additional material. A DVD of the series was released on 2 October 2006 in the UK. This marks the first commercial release of any BBC radio programme in a 5.1 surround mix. The disc contains as extras: the full version of the Krikkit Song, a photogallery, the original online and radio trailers, the appearance of the series on Pick of the Week, and thirty minutes of behind the scenes video in five short segments.

Since the opening of the third book starts at the same place and time (prehistoric Earth) as the opening of the second radio series, the entire Secondary Phase was dismissed as one of Zaphod's "psychotic episodes" (including events that did take place in the books). After the initial Tuesday broadcast, audio streams of the episode were available until the following Tuesday. For these final phases, the core cast (Simon Jones, Geoffrey McGivern, Mark Wing-Davey, Susan Sheridan and Stephen Moore) returned, along with William Franklyn as the new voice of The Book (assisted by Rula Lenska). In addition, David Dixon, Sandra Dickinson, Bill Paterson, Roy Hudd and Jonathan Pryce, who had roles in the TV adaptation or the original radio series, all returned, though Dixon and Paterson both play new roles.

The "Quandary Phase" was released in a 2-CD set in late May 2005. The CDs contain material not present in the original transmissions, due to time constraints. The enclosed booklet contains notes from Dirk Maggs, Simon Jones, Bruce Hyman and Helen Chattwell. A 2-CD release of the "Quintessential Phase" was released in mid-June 2005, with similar material left out of the original transmissions, and notes in the booklet by the same four individuals.

The Quandary Phase

thumb|right|200px|Front cover of the BBC Audio release of the "Quandary Phase" (Fits 19-22) of The Hitchhiker's Guide to the Galaxy.

Fit the Nineteenth

  • Broadcast on BBC Radio 4, 3 May 2005

:Cast:

:* The Book: William Franklyn

:* The Book's "Update" voice (uncredited): Rula Lenska

:* Arthur Dent: Simon Jones

:* Ford Prefect: Geoffrey McGivern

:* Rob McKenna: Bill Paterson

:* Fenchurch (Fenny): Jane Horrocks

:* Barman: Arthur Smith

:* Russell: Rupert Degas

:* Vogon Guard (and Alien Teaser, uncredited): Bob Golding

:* Stewardess: Alison Pettitt

:* Hooker: Fiona Carew

:* Vogon Helmsman: Michael Cule

:* Evil-looking bird/Canis Pontiff: Chris Emmett

:* Vogon Captain: Toby Longworth

:* Announcer: John Marsh

Arthur discovers that the entry for "Earth" in the Hitchhiker's Guide to the Galaxy, which formerly had been edited down to "Mostly Harmless", has been replaced, with Ford's original full version. They head towards Earth independently, Arthur arriving first. After landing in a field in Somerset, Arthur tries to hike a lift to Cottington, to see if his house still exists. Along the way, he meets Rob McKenna, a man who complains about the rain, before realising he has hitched a lift the wrong way. He gets out, and gets a lift with Russell, whose sister, Fenchurch, is out cold on a back seat of the car. Arthur is instantly smitten, and asks about her. Russell claims that she is mad, and has been ever since "the hallucinations"&mdash;the Vogon Constructor Fleet.

On the Constructor Fleet, a junior crew member notices that Earth has re-appeared. He is overridden by the captain, Jeltz, who declares that he saw it destroyed himself.

Meanwhile, Ford is stuck in a bar with a large bill, which he avoids paying by promising to write an entry for the bar in the Guide. On the streets, he is asked by a hooker whether he is "rich", and says that he might be&mdash;being owed several years back pay for writing two words. He shows the two words&mdash;"Mostly Harmless"&mdash;to the hooker, and is shocked to see the guide updating this to his full entry. He decides to go to Earth himself.

Fit the Twentieth

  • Broadcast on BBC Radio 4, 10 May 2005

:Cast:

:* The Book: William Franklyn

:* Arthur Dent: Simon Jones

:* Ford Prefect: Geoffrey McGivern

:* Rob McKenna: Bill Paterson

:* Fenchurch: Jane Horrocks

:* Raffle Woman: June Whitfield

:* BT Operator/Barmaid/News Anchor 2: Ann Bryson

:* Jim (Bartender)/News Anchor 1: Simon Greenall

:* Speaking Clock: Brian Cobby

:* Ecological Man/Zirzla Leader: David Dixon

:* Arthur's BBC Boss: Geoffrey Perkins

:* Announcer: John Marsh

Arthur arrives at his house, finding it undemolished and the phone ringing. He is unable to get to the phone before it rings off. The contents of the house are as he left them, apart from a large pile of junk mail just inside the front door, and a strange bowl, bearing the inscription "So Long and Thanks for All the Fish". He phones his boss at the BBC to explain that he has been absent due to going mad and would return to work when hedgehogs come out of hibernation (plus a few minutes to have a shave).

Driving, he encounters Fenchurch again, and gives her a lift to the train station, saying that he has something he wants to tell her. At the station pub they attempt to engage in conversation, but are interrupted by someone offering raffle tickets. Fenchurch has to leave to catch her train, and leaves her phone number on a ticket&mdash;with which Arthur then wins the raffle.

Distraught, Arthur decides to find the Islington cave that he spent some years in during prehistoric times. He knocks on a few doors in Islington near where he thinks that cave was, firstly calling at Friends of the World. When there he attempts to make a donation to "save the dolphins" but is met with mockery from the "Ecological Man" (played by David Dixon, Ford Prefect from the television series. There is a brief allusion to the TV series as Arthur asks if they've met before). The next door he knocks on is Fenchurch's. She is surprised that he didn't call first, shows him his misplaced copy of the Guide, and notes that they need to talk.

Fit the Twenty-First

  • Broadcast on BBC Radio 4, 17 May 2005

:Cast:

:* The Book: William Franklyn

:* Arthur Dent: Simon Jones

:* Ford Prefect: Geoffrey McGivern

:* Fenchurch: Jane Horrocks

:* Murray Bost Henson: Stephen Fry

:* East River Creature: Jackie Mason

:* Vogon Councillor: Dominic Hawksley

:* Steward: Simon Greenall

:* Mrs Kapelsen: Margaret Robertson

:* Vogon Clerk: Michael Cule

:* Prostetnic Vogon Jeltz: Toby Longworth

:* Wonko the Sane (John Watson): Christian Slater

:* Announcer: John Marsh

Fenchurch tells Arthur about her revelation at the time of the Vogon fleet's visit. At her urging, Arthur figures out that her feet do not touch the ground, leading him to suspect that she also can fly, and to a romantic tryst on the wing of a Heathrow-bound airplane.

Curious about the dolphins' fate, Arthur and Fenchurch head to California to visit Wonko the Sane, a scientist considered the foremost expert on the species. Wonko, who lives in an inside-out house called "The Outside of the Asylum" and claims to have had conversations with green-winged angels, tells Arthur and Fenchurch that they all received the same glass bowls&mdash;farewell gifts from the dolphins that, when pinged, play their final message to humans.

Meanwhile, a Vogon inquiry reveals that Earth's location in a plural zone means that any destroyed version is highly likely to be replaced by an alternate one. The Vogons decide that all Earths must still be destroyed, even though the bypass project has been cancelled.

The music that plays when Arthur determines that Fenchurch can fly, and again during the end credits, is strongly reminiscent of the style of Dire Straits. The book, "So Long, and Thanks for all the Fish", says that Arthur and Fenchurch listened to Dire Straits on a Walkman cassette player, with two sets of headphones, while flying together (inspired by the music that Douglas Adams listened to whilst writing the book).

Fit the Twenty-Second

  • The final episode in the adaptation of So Long, and Thanks For All the Fish.
  • Broadcast on BBC Radio 4, 24 May 2005

:Cast:

:*The Book: William Franklyn

:*Arthur Dent: Simon Jones

:*Ford Prefect: Geoffrey McGivern

:*Rob McKenna: Bill Paterson

:*Fenchurch: Jane Horrocks

:*Tricia McMillan: Sandra Dickinson

:*Marvin the Paranoid Android: Stephen Moore

:*The Lajestic Vantrasheel of Lob: Bob Golding

:*Stewardess: Alison Pettitt

:*Speaking Clock: Brian Cobby

:*Nick Clarke: Himself

:*Charlotte Green: Herself

:*Peter Donaldson: Himself

:*Sir Patrick Moore: Himself

:*Announcer: John Marsh

Fenchurch and Arthur return to England, to discover that a large spaceship has landed in Knightsbridge, London, bringing Ford Prefect with it. Fenchurch, Arthur and Ford leave on the ship. Arthur begins to suspect that this is not the Earth he and Ford knew&mdash;there is a "Tricia McMillan" on the news, with an American accent and blonde hair (voiced by Sandra Dickinson, who played Trillian in the TV series), but otherwise identical to the Trillian who left his earth with Zaphod Beeblebrox. Fenchurch and Arthur go to see God's Final Message to His Creation, and bump into Marvin, who is also en route to see it. Marvin is now 37 times older than the universe itself, and needs assistance to read the message, which turns out to be "WE APOLOGISE FOR THE INCONVENIENCE". Declaring that he thinks he feels good about the message, Marvin dies.

This is followed by an event only mentioned in Mostly Harmless. Fenchurch asks Arthur to show her the universe. However, on a commercial liner flight, Fenchurch disappears, and the ship's crew deny she ever existed...

At the conclusion of the show's credits, a tie-in website is announced: McKenna's All-Weather Haulage.

The Quintessential Phase

thumb|right|200px|Front cover of the BBC Audio release of the "Quintessential Phase" (Fits 23-26) of The Hitchhiker's Guide to the Galaxy.

The Quintessential Phase has one sub-plot of Zaphod attempting to reach Zarniwoop (which did occur in Fit the Twelfth, but that version was dismissed during the Tertiary Phase as Zaphod having a "psychotic episode"—another version of events occurs here, in an attempt to interconnect all five series). Zarniwoop has been merged with the character Vann Harl from Mostly Harmless. This radio series also sees the return of the characters of Max Quordlepleen, Thor, and Zarquon (who all appeared in Fit the Fifth at Milliways), and also Mr Prosser, from Fit the First. None of these characters appear in the book version of Mostly Harmless.

The start of some of the plot threads from Mostly Harmless were introduced in the Quandary Phase (though they did not appear in So Long, and Thanks for All the Fish)—notably the Vogons discovering that Earth had re-appeared and resolving to destroy all versions of it, Arthur having sold his DNA, a mention that Trillian now has a child and is now a reporter. Also the final episode saw the introduction of an alternate version of Trillian, still known as Tricia McMillan, who is identical to the original Trillian except for being blonde and American. This alternate McMillan is played by Sandra Dickinson, who played Trillian in the television series.

The events at the end of this series are referenced in the latest Hitchhiker book, And Another Thing... by Eoin Colfer, where the dream sequence the Hitchhiker's Guide Mk.2 puts Trillian into involves the Babel Fish teleporting her and the other main characters away from the destroyed Earth to Milliways, similar to one of the endings. Van Harl is also mentioned as Zarniwoop Van Harl, among other nods to the radio series such as a reference to Brontitall and the bird people from the Secondary Phase that were never put into the novels.

Fit the Twenty-Third

  • Broadcast on BBC Radio 4, 31 May 2005

:Cast:

:*The Book: William Franklyn

:*Voice of the Bird: Rula Lenska

:*Arthur Dent: Simon Jones

:*Ford Prefect: Geoffrey McGivern

:*Zaphod Beeblebrox: Mark Wing-Davey

:*Trillian: Susan Sheridan

:*Tricia McMillan: Sandra Dickinson

:*Zarniwoop Vann Harl: Jonathan Pryce

:*Eddie the Computer: Roger Gregg

:*Grebulons: Andy Taylor and Michael Fenton Stevens

:*Prophet: John Challis

:*Information Creature: Mitch Benn

:*Gail Andrews: Lorelei King

:*Colin the Robot: Andrew Secombe

:*Announcer: John Marsh

The episode opens with a Grebulon spaceship suffering an accident, and losing nearly all records of what it is and what it should be doing, along with the crew's memories of why. Based on what little remains of their orders, they land on the tenth planet from the Sun, and start to 'monitor' Earth.

After a year's travelling Arthur has returned to the co-ordinates ZZ9 plural Z alpha—where he is expecting to find Earth, and perhaps Fenchurch. In its place, he finds a barely colonised planet called NowWhat, although with the right continents for Earth. The creature at the information desk explains that beings from a "plural" region are not advised to travel in hyperspace due to the risk of slipping in dimensions. He is directed to Hawalius, a planet of oracles.

During a flashback, the introduction between Trillian and Zaphod Beeblebrox is revealed. But on a parallel Earth, an American and blonde Tricia McMillan (who was left behind by her universe's Zaphod) is interviewing Gail Andrews, an astrologer, about the effect that the recently discovered planet Persephone (nicknamed Rupert) will have on astrology. The Grebulons, monitoring this, have an idea.

Later, Andrews and McMillan talk. Andrews has sensed that McMillan is unhappy about the stars—McMillan reveals that she met an alien (Zaphod Beeblebrox) at a party once (a variation of the previous flashback ensues), but didn't get to go with him because she fetched her bag. She also reveals that she just missed out on a TV job in New York City because she did not go back to fetch her bag.

Meanwhile, Zaphod (who does not appear in the book) is attempting to meet Zarniwoop once more, convinced that the Total Perspective Vortex (from Fit the Eighth) was not just his imagination. He has arrived at Saquo-Pilia Hensha, the new location of the offices for The Hitchhiker's Guide to the Galaxy. He sneaks into the building pretending to deliver pizza, and goes to the editor's office. He meets Zarniwoop Vann Harl, who promises to explain matters.

The story turns back to Arthur, who has arrived at Hawalius. He is told by an oracle that prophecy is a dead business now, due to news reports from the future using time travel. He is given a piece of free advice—"it'll all end in tears, probably already has", and sent on his way to the next cave.

Back at the Hitchhiker's building, Ford is also sneaking in. He climbs into the building through the ventilation system, disables a security robot (which he dubs "Colin") by hardwiring it to be happy all the time, and then gets it to cover his entrance to the editor's office, finding out along the way that the Guide has been taken over and is no longer owned by Megadodo Publications. He too manages to get into the editor's office and finds that Vann Harl has been expecting Ford. The episode ends here on a cliff-hanger.

Fit the Twenty-Fourth

  • Broadcast on BBC Radio 4, 7 June 2005

:Cast:

:*The Book: William Franklyn

:*Voice of the Bird: Rula Lenska

:*Arthur Dent: Simon Jones

:*Ford Prefect: Geoffrey McGivern

:*Zaphod Beeblebrox: Mark Wing-Davey

:*Zarniwoop Vann Harl: Jonathan Pryce

:*Old Man on the Pole: Saeed Jaffrey

:*Smelly Photocopier Woman: Miriam Margolyes

:*Tricia McMillan: Sandra Dickinson

:*Stewardess: Lorelei King

:*Colin the Robot: Andrew Secombe

:*Accountancy Bird and Lift: Roger Gregg

:*Grebulon Underling: Philip Pope

:*Grebulon Lieutenant and Accountancy Bird: Michael Fenton Stevens

:*Accountancy Bird: Danny Flint

:*Announcer: John Marsh

Arthur is still trying to gain advice on the planet Hawalius, but when he finally leaves the planet, the spaceship he's on develops "a major glitch" just as they jump into hyperspace. Meanwhile, on Earth, Tricia McMillan agrees to go with the Grebulons and work out a system of astrology that would be valid on the planet Persephone (Rupert), in exchange for exclusive rights to the story.

Back in The Guides offices, Zarniwoop Vann Harl, the new editor of the guide, asks Ford to be his restaurant critic. He explains that there is a new Guide, aimed at families rather than hitchhikers, and they plan to make one and sell it in billions of billions of alternate worlds. Ford steals the Dine-a-Charge and Ident-i-Eze cards from him, then hacks into the accountancy system. The universe there is equated with the artificial universe inside Zarniwoop's office, and Ford discovers Zaphod, in a shack by the beach, claiming he has been there on his own for a month. Zaphod claims that the Presidency and the Krikkitmen were just a distraction, and that they have "shrunk the Vortex and given it the voice of that Lintilla chick" in order to create the new Guide. The episode ends with Ford going to floor 23, and being forced to jump out of a window, in order to escape from Zarniwoop Vann Harl, who is revealed to be a disguised Vogon.

Fit the Twenty-Fifth

  • Broadcast on BBC Radio 4, 14 June 2005

:Cast:

:*The Book: William Franklyn

:*Voice of the Bird: Rula Lenska

:*Arthur Dent: Simon Jones

:*Ford Prefect: Geoffrey McGivern

:*Trillian: Susan Sheridan

:*Tricia McMillan: Sandra Dickinson

:*Random Dent: Sam Béart

:*Old Thrashbarg: Griff Rhys Jones

:*Strinder and Doctor: Roger Gregg

:*Grebulon Leader: Andy Taylor

:*The Patient: Lorelei King

:*Grebulon Lieutenant: Michael Fenton Stevens

:*Colin the Robot: Andrew Secombe

:*Prostetnic Vogon Jeltz: Toby Longworth

:*Speaking Clock: Brian Cobby

:*Announcer: John Marsh

Arthur Dent has, since the last episode, settled on the planet his ship crash-landed on, Lamuella, which is partly in a "plural zone". He is occupied as The Sandwich Maker, making sandwiches for the inhabitants of a village from the meat of the Perfectly Normal Beast. Perfectly Normal Beasts are rather like bison, and migrate.

A messenger brings news to the Sandwich Maker that a spaceship has landed on the planet. When Arthur approaches it, he is surprised to see Trillian disembark. Trillian explains that the crash was known about, but nobody has been to rescue him for insurance reasons. She explains that she had a daughter, named Random, using sperm sold by Arthur, and has come to drop off her daughter (of indeterminate age due to time travel, but probably around 16), whilst she is off covering a war.

At the Hitchhiker's Guide building, Ford saves himself by using Colin's antigravity systems to get to a ledge on the 13th floor of the building. He bypasses the rocket-proof glass by unlatching the window. Colin notes that the rocket-proof glass was installed after the Frogstar attack on the building (in Fit the Seventh), which Ford knows nothing about.

Meanwhile, on Lamuella, Random is not settling in well. Born on a spaceship going from one place to another place, she doesn't consider anywhere home, and Earth, the world both her parents are from, has been destroyed. A robot courier arrives with a package, for Ford Prefect care of Arthur Dent, which Arthur decides to keep safely closed on the basis that anything that involves Ford Prefect is dangerous. Distraught at her lack of place in the universe, Random runs off with the package into the forest, which is considered haunted by the natives of Lamuella.

Random discovers that the holo-entertainment system from the rocket ship that Arthur Dent crash landed in, which is still functional, as the source of the "hauntings". She opens the package, revealing the Guide Mark II, in the form of a black bird. The Bird explains the nature of probability and that some alternative Earths do exist, and persuades Random to go to one of them. Random challenges the Bird to get her a spaceship there, and just at that moment, one lands. She downs the pilot with a well-thrown rock, and leaves Lamuella.

The alternate Tricia McMillan has been taken to Rupert and meets the Grebulon leader, who explains their problem of having forgotten everything, and their reasoning in trying to gain purpose through astrology. Meanwhile, Arthur has been looking for Random and has seen the spaceship. Searching the forest he stumbles onto the pilot of the ship, Ford Prefect.

Fit the Twenty-Sixth

  • The final episode in the adaptation of Mostly Harmless
  • Broadcast on BBC Radio 4, 21 June 2005

:Cast:

:*The Book: Peter Jones and William Franklyn

:*Voice of the Bird (and Lintilla, uncredited): Rula Lenska

:*Arthur Dent: Simon Jones

:*Ford Prefect: Geoffrey McGivern

:*Zaphod Beeblebrox: Mark Wing-Davey

:*Trillian: Susan Sheridan

:*Tricia McMillan: Sandra Dickinson

:*Random: Sam Bèart

:*Marvin the Paranoid Android: Stephen Moore

:*Fenchurch: Jane Horrocks (uncredited)

:*Old Thrashbarg: Griff Rhys Jones

:*Bartender: Roger Gregg

:*Vogon Helmsman: Michael Cule

:*Thor: Dominic Hawksley

:*Grebulon Leader: Andy Taylor

:*Prostetnic Vogon Jeltz and Wowbagger: Toby Longworth

:*Grebulon Lieutenant: Mike Fenton Stevens

:*Elvis: Philip Pope

:*The Newsreader: Neil Sleat

:*Max Quordlepleen: Roy Hudd

:*Runner: Tom Maggs

:*Agrajag: Douglas Adams

:*Announcer: John Marsh

The episode opens with Ford and Arthur on Lamuella. Ford explains about the new guide and its ability to use Reverse Temporal Engineering in order to arrange circumstances for the benefit of its user. Ford's spaceship itself he obtained by jumping from a building and falling into it, its previous occupant having accidentally pressed the wrong sort of eject button. Tracing

back, he discovered that a trail of coincidences led back to the new Guide, which was responsible. With Random stealing the ship and the Bird, they are stuck, with no immediate way to get offworld to prevent the Vogons from doing whatever it is they intend to do. They decide that the Perfectly Normal Beasts are the best way off the planet. The migration has already started, and this sees them appear at one point, run past Lamuella, and then disappear again, evidence of a dimensional shift. Old Thrashbarg helps them slow a Perfectly Normal Beast long enough for them to get onto it, and tells them that they will be entering the Domain of the King.

On the alternate Earth, Tricia McMillan has returned from Rupert, and is lamenting that none of the footage she has taken is usable. She is interrupted by a member of the hotel staff, telling her that a spaceship has landed in Regent's Park, and the young girl on the ship is demanding to see her. Meanwhile, the Grebulon leader is still unhappy. Whilst they now have horoscopes, he now knows that unless he takes positive action, then due to the Earth rising, he will have a very bad month. He decides to investigate the possible astrological uses of the Grebulon's gun turrets.

Arthur and Ford arrive at the Domain of the King Bar and Grill, which has numerous spaceships outside of it, including a large pink one. Inside, they have a couple of bacon rolls, whilst Ford buys the pink spaceship from the bar singer, Elvis Presley. They then depart for Earth. After arriving, they find that Tricia McMillan has taken Random to a club, and go there themselves. A strange man confronts Arthur, and says "I told you not to come here!" Arthur and Ford find Random, along with Tricia and Trillian (who had arrived in the meantime on a third spaceship). Random is holding a gun and threatening to shoot. Trillian explains they must leave the planet immediately, as the Grebulons (a missing spaceship from the war she was sent to cover) are about to destroy the planet, once again.

Arthur explains it is impossible for him to die (and hence for the planet to be destroyed), but the strange man goes for Random's gun and she ends up shooting him. Trillian points out the name of the club to Arthur—Stavro Müller Beta—while Arthur realizes the strange man is Agrajag. Arthur accepts his fate, and the Earth is destroyed...

Epilogue

An updated edition of the Guide notes that Babel fish share the ability of the dolphins in shifting sideways in probability when required, bringing their host and sometimes other people in the vicinity with them, and notes that this in fact has happened. The Guide shares the fate of Arthur in two alternate realities: the first, continuing from the end of Fit the Twelfth, sees Arthur and Lintilla and several of her clones aboard the Heart of Gold; the second sees Arthur from the beginning of the story, this time battling Prosser over the fate of his home, with Fenchurch now lying with him in front of the bulldozer.

The Guide then details the true reality of what happened: the Babel Fish brought Arthur, Ford, Random, Zaphod and Trillian (now merged with Tricia) to Milliways, the Restaurant at the End of the Universe, Table 42. Zaphod discovers Marvin was still under warranty and has been restored to physical health, and is once again parking cars at Milliways, albeit with a promotion, and Arthur discovers the waitress serving their table is Fenchurch, who has been at Milliways waiting for him to turn up. As Wowbagger the Infinitely Prolonged arrives to insult the Great Prophet Zarquon, making his perennial appearance on the Milliways stage, Wowbagger's immortality is rescinded, and he dies. Elsewhere in the universe, Prostetnic Vogon Jeltz, having finally destroyed the Earth after all this time, is able to tick the box on his orders and move on. Reunited, Arthur promises to take Fenchurch flying.

The Hexagonal Phase

On Thursday 8 March 2018, 40 years to the day of the first series' original broadcast in 1978, a sixth series dubbed the "Hexagonal Phase" began broadcasting on BBC Radio 4. This series was based on the sixth novel And Another Thing... by Eoin Colfer and featured members of both the original radio and television casts.