Elenco
Tom Baker
The Doctor
Elisabeth Sladen
Sarah Jane Smith
Tony Beckley
Harrison Chase
Kenneth Gilbert
Richard Dunbar
Michael Barrington
Sir Colin Thackeray
Sylvia Coleridge
Amelia Ducat
John Challis
Scorby
Mark Jones
Arnold Keeler / Krynoid (voice)
Seymour Green
Hargreaves
Michael McStay
Derek Moberley
Hubert Rees
John Stevensen
John Gleeson
Charles Winlett
Ian Fairbairn
Doctor Chester
John Acheson
Major Beresford
Ray Barron
Sergeant Henderson
Alan Chuntz
Chauffeur
David Masterman
Guard Leader
Harry Fielder
Guard
Pat Gorman
Guard
Ian Elliott
Guard
Keith Ashley
Sir Colin's Aide
Ronald Gough
Marine
Patrick Milner
Marine
Barry Summerford
UNIT Soldier
Tony Snell
UNIT Soldier
Patrick Ginter
UNIT Soldier
Rowland Geall
UNIT Soldier
Derek Wayland
UNIT Soldier
Keith Ashley
The Krynoid
Ronald Gough
The Krynoid
Equipe
Robert Holmes
Script Editor
Douglas Camfield
Director
Robert Banks Stewart
Writer
Philip Hinchcliffe
Producer
M.A.C. Adams
Editor
Geoffrey Burgon
Original Music Composer
Jeremy Bear
Production Design
Ann Briggs
Makeup Artist
Richard Conway
Visual Effects
John Dixon
Lighting Director
George Gallaccio
Production Manager
Graeme Harper
Production Assistant
John Holmes
Sound
Clive Potter
Lighting Technician
Vic Godrich
Sound
Keith Hopper
Camera Operator
Barbara Lane
Costume Design
Dick Mills
Special Sound Effects
Roger Murray-Leach
Production Design
Terry Walsh
Fight Choreographer
Delia Derbyshire
Theme Song Performance