Jon Pertwee

The Doctor

Acting

Patrick Troughton

The Doctor

Acting

William Hartnell

The Doctor

Acting

Katy Manning

Jo Grant

Acting

Nicholas Courtney

Brigadier Lethbridge-Stewart

Acting

John Levene

Sergeant Benton

Acting

Stephen Thorne

Omega

Acting

Rex Robinson

Doctor Tyler

Acting

Roy Purcell

President of the Council

Acting

Laurie Webb

Mr. Ollis

Acting

Clyde Pollitt

Chancellor

Acting

Graham Leaman

Time Lord

Acting

Patricia Prior

Mrs. Ollis

Acting

Denys Palmer

Corporal Palmer

Acting