thumb|right|From the first episode (1968) L-R: Todd Starke, Day, and [[Philip Brown (actor)|Philip Brown ]]
thumb|right|Publicity photo, 1968
thumb|right|Day with [[Lew Ayres (Seasons 2–3), 1970 ]]
thumb|right|On set of show
The Doris Day Show is an American television sitcom that aired on CBS from September 24, 1968, to March 12, 1973, remaining on the air for five seasons and 128 episodes.
The series is remembered for its multiple format and cast changes over the course of its five-year run. The show is also notable for Day's statement, in her autobiography Doris Day: Her Own Story (1975), that her husband Martin Melcher had signed her to do the series without her knowledge, a fact she only discovered when Melcher died of heart disease on April 20, 1968. Melcher also received credit on the series as an "executive producer" during its initial season.
Series run
Season 1 (1968–1969)
Day portrays Doris Martin, a widowed mother of young sons Billy and Toby (Philip Brown and Todd Starke). As the series begins, she has brought her boys home to her father's rural ranch in Mill Valley, north of San Francisco, California, after living in New York City for most of her adult life.
Other characters during this initial phase of the program include Doris's father Buck Webb (Denver Pyle) and their naïve hired ranch hand, LeRoy B. Simpson (James Hampton). Their housekeeper initially is Aggie Thompson (Fran Ryan, who left after the first 10 episodes to replace Barbara Pepper as Doris Ziffel in Green Acres). The character left without explanation and was replaced by Juanita (Naomi Stevens). Lord Nelson is also included in the opening credits cast as Lord Nelson, the family's sheepdog.
Season 2 (1969–1970)
Doris begins to commute from the ranch to San Francisco, where she starts working as an executive secretary at Today's World magazine. New workplace characters are added: McLean Stevenson (who would later leave the series to star in M*A*S*H) plays her boss, Today's World editor Michael Nicholson, who is often referred to as 'Nick' by the other magazine executives; Rose Marie plays Doris' friend Myrna Gibbons, a fellow secretary at the magazine; Paul Smith portrays Ron Harvey, the magazine's assistant-editor and Myrna's boss. Pyle, Brown, and Starke remain regular cast members, while Hampton appears in only one episode, his character now married and owning a gas station in Mill Valley. Lord Nelson still appears uncredited as the family sheepdog in most episodes this season. The ranch no longer has a housekeeper, and no ranch hand was hired to replace LeRoy.