Silent Witness is a British crime drama television series produced by the BBC that focuses on a team of forensic pathology experts and their investigations into various crimes. The series was created by Nigel McCrery, a former murder squad detective based in Nottingham. Since its initial release on 21 February 1996, 29 series have been broadcast.

Amanda Burton starred as primary character Professor Sam Ryan before leaving the show during the eighth series. Since her departure, the series has featured an ensemble cast, which initially consisted of William Gaminara, Tom Ward and Emilia Fox and later on David Caves, Liz Carr and Richard Lintern alongside Emilia Fox. At the end of series 23, Carr and Lintern departed.

The programme is broadcast in more than 235 territories, including ABC in Australia, Showcase and the Knowledge Network in Canada, KRO in the Netherlands, TV One and Prime in New Zealand, BBC First in South Africa and BBC America in the United States.

Series overview

The main character in the original series was based on Professor Helen Whitwell, a forensic pathologist based in Sheffield, whom McCrery had known while serving as a police officer. The programme followed the activities of pathologist Sam Ryan, played by Amanda Burton, until she departed early in the eighth series.

There was a succession of regular supporting characters, changing almost every series, but Dr Leo Dalton (William Gaminara) and Dr Harry Cunningham (Tom Ward), who were introduced in the sixth series, continued as lead characters following Ryan's departure, with Dalton replacing her as professor.

A new character, Dr Nikki Alexander (Emilia Fox), was introduced in mid-series eight, a forensic scientist based in Sheffield. While working as a forensic anthropologist, she appropriates facilities and software in the pathology department to analyse an Iron Age find, with the belated, bemused and begrudging approval of Dalton. Dr Alexander is able to assist in a set of cases being investigated by the team, because it transpires that she has "worked in forensic pathology in Johannesburg for six months" and is certified by the Home Office to practice. She eventually overcomes Leo's reluctance and, with Harry's support, is offered and accepts a position on the team.

Before the 16th series begins, Harry has left to accept a position in New York City. He is succeeded by forensics expert Jack Hodgson (David Caves) and his assistant Clarissa Mullery (Liz Carr). At the climax of the 16th series, Leo is killed in an explosion. His replacement, Dr Thomas Chamberlain (Richard Lintern), is introduced at the start of the 17th series.

Although the show focuses heavily on areas of pathology, the police also have a presence in each case. During later series of the show, detectives and investigators tend to differ from episode to episode, with guest artists appearing in these roles. However, during the early years of the show several characters appeared regularly to investigate each case.

Location

The first three series are set in Cambridge. The setting changed to London from the start of Series 4. From Series 6, the setting moved to the Lyell Centre, the Pathology Department of UCL. The programme remained in an academic setting until the end of Series 16 when the Lyell appeared to have become separated from the university and operated as a stand-alone institution. In 2023 it was announced that production for Silent Witness would be moving to Birmingham. This was reflected in the show at the end of Series 28, with Nikki accepting an offer to set up a new forensic centre in the city along with her team. From Series 29, the show was set at the Sir William Bowman Center of Excellence in Birmingham.

Format

Each series is typically made up of a series of two-part stories. The first nine series generally featured eight episodes (four two-part stories), except that series 4 and 5 each featured just six episodes (three two-part stories); this was increased to ten episodes (five two-part stories) from the tenth series onwards, except series 12 and 15 which each featured 12 episodes (six two-part stories). The 25th series, broadcast in 2022, introduced a new format consisting of one story in six episodes, The vocal section is performed by Sarah Leonard.

Critical review

An episode first broadcast in April 2012 attracted criticism for its violent and sadistic content. There were 632 complaints made about the fifteenth-series episode Redhill, written by Ed Whitmore, which included a scene depicting a sadistic sexual and murderous attack. The BBC was censured by the editorial committee of the BBC Trust, which said in its report: