Doctor Who season 16

Doctor Who
Season 16
Cover of the 2008 Region 2 DVD release
Starring	Tom Baker Mary Tamm John Leeson
No. of stories	6
No. of episodes	26
Release
Original network	BBC1
Original release	2 September 1978 (1978-09-02) – 24 February 1979 (1979-02-24)
Season chronology
← Previous Season 15 Next → Season 17
List of episodes

The sixteenth season of British science fiction television series Doctor Who, known collectively as The Key to Time, began on 2 September 1978 with The Ribos Operation, and ended with The Armageddon Factor. The arc was originally conceived by producer Graham Williams, who had proposed it as part of his application for the producer's job in 1976.^[1] The name refers to the powerful artefact, the segments of which are what the Fourth Doctor and his companions, Romana and K9, search for during the season. Anthony Read continued in his role as script editor, from the previous season. Douglas Adams also became script editor alongside Read.