Edward Burnham

Professor Watkins

James Thornhill

Sergeant Walters

Sally Faulkner

Isobel Watkins

Peter Halliday

Packer

Robert Sidaway

Captain Turner

Nicholas Courtney

Brigadier Lethbridge-Stewart

John Levene

John Benton

Kevin Stoney

Tobias Vaughn

Douglas Camfield

Director

Derrick Sherwin

Writer

Sylvia James

Makeup Artist

Martyn Day

Editor

Bobi Bartlett

Costume Design

Kit Pedler

Story

Peter Bryant

Producer

Don Harper

Original Music Composer

Richard Hunt

Production Design

Bill King

Visual Effects