Tom Baker

The Doctor

Elisabeth Sladen

Sarah Jane Smith

Milton Johns

Guy Crayford

Peter Welch

Morgan

Martin Friend

Styggron

Max Faulkner

Cpl. Adams

Dave Carter

Grierson

Ian Marter

Harry Sullivan

Roy Skelton

Chedaki

John Levene

RSM Benton

Stuart Fell

Kraal

Patrick Newell

Col. Faraday

Hugh Lund

Matthews

Heather Emmanuel

Tessa

Barry Letts

Director

Terry Nation

Writer

Barbara Lane

Costume Design

Dudley Simpson

Original Music Composer

Philip Hinchcliffe

Producer

Mike Stoffer

Editor

Alan Arbuthnott

Lighting Artist

Philip Lindley

Production Design

Dick Mills

Special Sound Effects

Alan Machin

Sound

Len Hutton

Visual Effects

Doug Mawson

Sound

Len Newson

Camera Operator

Terry Walsh

Fight Choreographer

Duncan Brown

Lighting Director

Sylvia Thornton

Makeup Artist

Marion McDougall

Production Assistant

Robert Holmes

Script Editor

Delia Derbyshire

Theme Song Performance