William Hartnell

The Doctor

Jackie Lane

Dodo Chaplet

Anneke Wills

Polly

Michael Craze

Ben Jackson

John Harvey

Professor Brett

John Cater

Professor Krimpton

William Mervyn

Sir Charles Summer

Alan Curtis

Major Green

Gerald Taylor

War Machine Operator/The Voice of WOTAN

Sandra Bryant

Kitty

Ewan Proctor

Flash Customer

George Cross

The Minister

Kenneth Kendall

Himself

Ric Felgate

American Journalist

Carl Conway

American Journalist

John Doye

Interviewer

Dwight Whylie

Radio Announcer

Desmond Cullum-Jones

Worker

Roy Godfrey

Tramp

Michael Rathborne

Taxi Driver

Edward Colliver

Mechanic

John Rolfe

Soldier

John Boyd-Brent

Soldier

Frank Jarvis

Soldier

Robin Dawson

Soldier

John Slavid

Man in Telephone Box

Mike Reid

Soldier