Peter Davison

Character: The Doctor

Matthew Waterhouse

Character: Adric

Janet Fielding

Character: Tegan

Sarah Sutton

Character: Nyssa

James Warwick

Character: Scott

Clare Clifford

Character: Kyle

Beryl Reid

Character: Briggs

June Bland

Character: Berger

Steve Morley

Character: Walters

Suzi Arden

Character: Snyder

Ann Holloway

Character: Mitchell

Anne Clements

Character: Trooper

Mark Straker

Character: Trooper

Alec Sabin

Character: Ringway

Mark Fletcher

Character: Crewmember

Christopher Whittingham

Character: Crewmember

David Banks

Character: Cyber Leader

Mark Hardy

Character: Cyber Lieutenant

William Hartnell

Character: The Doctor (1) (archive footage)

Patrick Troughton

Character: The Doctor (2) (archive footage)

Tom Baker

Character: The Doctor (4) (archive footage)