Jon Pertwee

The Doctor

Patrick Troughton

The Doctor

William Hartnell

The Doctor

Katy Manning

Jo Grant

Nicholas Courtney

Brigadier Lethbridge-Stewart

John Levene

Sergeant Benton

Stephen Thorne

Omega

Rex Robinson

Doctor Tyler

Roy Purcell

President of the Council

Laurie Webb

Mr. Ollis

Clyde Pollitt

Chancellor

Graham Leaman

Time Lord

Patricia Prior

Mrs. Ollis

Denys Palmer

Corporal Palmer

Lennie Mayne

Director

Dave Martin

Writer

Bob Baker

Writer

Barry Letts

Producer

James Acheson

Costume Design

Ann Rayment

Makeup Artist

Dudley Simpson

Original Music Composer

Roger Liminton

Production Design

Derek Miller-Timmins

Sound

Dick Mills

Special Sound Effects

Jim Walker

Editor

John Baker

Camera Operator

David Tilley

Production Assistant

Michealjohn Harris

Visual Effects

Delia Derbyshire

Theme Song Performance