Born in Llandaff, Cardiff, Terry Nation initially worked in comedy, entering the industry in 1955 after a (possibly apocryphal) incident in which Spike Milligan bought a sketch that he had written because he thought that Nation appeared hungry. During the 1950s, Nation worked with John Junkin and Johnny Speight for writers’ agency Associated London Scripts, where he collaborated on hundreds of radio plays for comedians such as Terry Scott, Eric Sykes, Harry Worth and Frankie Howerd. His career break came in 1962, when he was commissioned to write material for Tony Hancock – first for Hancock’s unsuccessful series broadcast on Associated Television in 1963, and then his stage show. Although Nation accompanied Hancock as his chief screenwriter on tour in 1963, Hancock would regularly neglect Nation’s scripts in favour of recycling his old material. Following an argument over this, Hancock fired Nation. Prior to this, Terry Nation had declined an offer from scriptwriter David Whitaker to write for a new science-fiction programme that was entering production at the BBC; Whitaker had been impressed by a script that Nation had written for the ABC anthology series Out of this World. Now unemployed, and with a young family to support, Nation contacted Whitaker and accepted the offer, writing the second Doctor Who serial, The Daleks (also known as The Mutants and The Dead Planet). The serial introduced the eponymous extraterrestrial villains that would quickly become the series’ most popular and enduring monsters, and resulted in a major merchandising success for the BBC.

Having risen in the public consciousness, Terry Nation went on to contribute further scripts to Doctor Who. In 1965, Nation and Dennis Spooner co-wrote the 12-part serial The Daleks’ Master Plan, after which Nation, who still held the copyright to the Daleks, attempted to launch a Dalek spin-off TV series in the United States. Various other Dalek tie-in material appeared, including comic strips in the children’s weekly TV Century 21 and annuals; such material was frequently credited to Nation, even when written by others. Between 1966 and 1972, appearances by the Daleks in Doctor Who became less frequent and were written for the series by other authors. In 1973, following an eight-year absence from scriptwriting for the series, Nation returned to writing for the Daleks on Doctor Who with the Third Doctor serial Planet of the Daleks. In 1998, readers of Doctor Who Magazine voted Nation’s 1975 serial Genesis of the Daleks the greatest Doctor Who story of all time. In the story, Nation introduced the character of Davros, the creator of the Daleks, who went on to appear in further storylines. Terry Nation also wrote two non-Dalek scripts for Doctor Who, The Keys of Marinus in 1964, which introduced the Voord and The Android Invasion in 1975, which introduced the Kraal. During this time, Nation also worked in commercial TV, contributing scripts to series such as The Avengers, The Baron, The Champions, Department S, The Persuaders! and The Saint. Nation’s work on Doctor Who was the subject of the documentary Terror Nation, a special feature on the BBC DVD release of the serial Destiny of the Daleks.

Terry Nation suffered from poor health in his final years, and died from emphysema in Los Angeles on 9 March 1997. Shortly before his death, he had been collaborating with actor Paul Darrow on another attempt to revive Blake’s 7. In 2013, Nation was commemorated with a blue plaque at the house in Cardiff where he was born.