The Doctor (1)
William Hartnell
Polly
Anneke Wills
American Sergeant
John Brandon
Tito
Shane Shelton
Wigner
Steve Plytas
Radar Technician
Christopher Matthews
Geneva Technician
Ellen Cullen
R/T Technician
Christopher Dunham
TV Announcer
Glenn Beck
Cybermen (voice)
Roy Skelton
Peter Hawkins
Cyberman
Harry Brooks
Ben Jackson
Michael Craze
Reg Whitehead
Gregg Palmer
The Doctor (2) (uncredited)
Patrick Troughton
General Cutler
Robert Beatty
Barclay
David Dodimead
Dyson
Dudley Jones
Schultz
Alan White
Williams
Earl Cameron
Terry Cutler
Callen Angelo
Director
Derek Martinus
Writer
Gerry Davis
Script Editor
Costume Designer
Alexandra Tynan
Production Designer
Peter Kindred
Kit Pedler
Producer
Innes Lloyd