Tom Baker

The Doctor

Elisabeth Sladen

Sarah Jane Smith

Philip Madoc

Doctor Solon

Colin Fay

Condo

Michael Spice

Morbius (voice)

Stuart Fell

Morbius Monster

Cynthia Grenville

Maren

Gilly Brown

Ohica

John Scott Martin

Kriz

Jon Pertwee

The Doctor (3) (picture) (uncredited)

Patrick Troughton

The Doctor (2) (picture) (uncredited)

William Hartnell

The Doctor (1) (picture) (uncredited)

George Gallaccio

Morbius Doctor (picture) (uncredited)

Robert Holmes

Morbius Doctor (picture) (uncredited)

Graeme Harper

Morbius Doctor (picture) (uncredited)

Christopher Barry