About

The Keys of Marinus is the fifth serial of the British science fiction television series Doctor Who, which was first broadcast on BBC TV/BBC1 in six weekly parts from 11 April to 16 May 1964. Written by Terry Nation and directed by John Gorrie, the serial takes on a "mini-adventures" format, in which the First Doctor, his granddaughter Susan Foreman, and her teachers Ian Chesterton, and Barbara Wright search for four keys to restore the Conscience of Marinus, a computer which maintains law and order. The group travel to two cities, a jungle, and an icy wasteland in search of the keys.