출연진
Peter Davison
The Doctor
Matthew Waterhouse
Adric
Janet Fielding
Tegan
Sarah Sutton
Nyssa
James Warwick
Scott
Clare Clifford
Kyle
Beryl Reid
Briggs
June Bland
Berger
Steve Morley
Walters
Suzi Arden
Snyder
Ann Holloway
Mitchell
Anne Clements
Trooper
Mark Straker
Trooper
Alec Sabin
Ringway
Mark Fletcher
Crewmember
Christopher Whittingham
Crewmember
David Banks
Cyber Leader
Mark Hardy
Cyber Lieutenant
William Hartnell
The Doctor (1) (archive footage)
Patrick Troughton
The Doctor (2) (archive footage)
Tom Baker
The Doctor (4) (archive footage)