1966-10-29 • 25 min
The Cybermen take over the base again, apparently to stop the humans using the Z-Bomb, but then the Doctor realises they intend to use it themselves to destroy Earth.
William Hartnell
The Doctor
Anneke Wills
Polly
Michael Craze
Ben
Robert Beatty
General Cutler
Dudley Jones
Dyson
David Dodimead
Barclay
Steve Plytas
Wigner
Christopher Matthews
Radar Technician
Reg Whitehead
Jarl
Harry Brooks
Krang
Gregg Palmer
Gern
Ellen Cullen
Geneva Technician
Roy Skelton
Cybermen (voice)
Christopher Dunham
R/T Technician
Callen Angelo
Terry Cutler
Peter Hawkins
Cybermen (voice)