The broad narrative of Hitchhiker follows the misadventures of the last surviving man, Arthur Dent, following the demolition of the Earth by a Vogon constructor fleet to make way for a hyperspace bypass. The first of six new episodes was broadcast on 8 March 2018. In 2017, BBC Radio 4 announced a 40th-anniversary celebration with Dirk Maggs, one of the original producers, in charge. The sixth novel, And Another Thing, was written by Eoin Colfer with additional unpublished material by Douglas Adams. The first novel, The Hitchhiker's Guide to the Galaxy (1979), has been ranked fourth on the BBC’s The Big Read poll. The Hitchhiker's Guide to the Galaxy has become an international multi-media phenomenon the novels are the most widely distributed, having been translated into more than 30 languages by 2005. Originally a 1978 radio comedy broadcast on BBC Radio 4, it was later adapted to other formats, including novels, stage shows, comic books, a 1981 TV series, a 1984 text-based computer game, and 2005 feature film. The Hitchhiker's Guide to the Galaxy is a comedy science fiction franchise created by Douglas Adams.

The Hitchhiker's Guide to the Galaxy Hexagonal Phase (2018).

The Hitchhiker's Guide to the Galaxy Tertiary to Quintessential Phases (2004–05).

The Hitchhiker's Guide to the Galaxy Primary and Secondary Phases (1978–1980).

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