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)