Final adventure for the first incarnation of television's favourite time traveller. The Doctor (William Hartnell), Ben and Polly arrive at the South Pole Tracking station in 1986, just as a strange satellite enters Earth's orbit, affecting the latest space mission. The Doctor predicts that the new arrival is Mondas, Earth's long-lost twin planet, and is proved correct when the base is invaded by the Cybermen, the planet's ruthlessly logical and seemingly invulnerable inhabitants.
Director: Derek Martinus
Producer: Innes Lloyd
Writer: Kit Pedler
Actor: William Hartnell
Actor: Michael Craze
Actor: Anneke Wills
Actor: Robert Beatty
Actor: Dudley Jones
Actor: David Dodimead
Actor: Alan White
Actor: Earl Cameron
Actor: Shane Shelton
Actor: John Brandon
Actor: Steve Plytas
Actor: Christopher Matthews
Actor: Reg Whitehead
Actor: Harry Brooks
Actor: Ellen Cullen
Actor: Glenn Beck
Actor: Callen Angelo
Actor: Gregg Palmer
Voice: Peter Hawkins
Voice: Roy Skelton
Character: The First Doctor
Character: Ben Jackson
Character: Polly
Character: Cybermen
Character: Doctor Who