Tom Baker

The Doctor

Lalla Ward

Romana II

John Leeson

K9 (voice)

Adrienne Corri

Mena

Laurence Payne

Morix

John Collin

Brock

David Haig

Pangol

Nigel Lambert

Hardin

Martin Fisk

Vargos

Roy Montague

Guide

Ian Talbot

Klout

Harriet Reynolds

Tannoy (voice)

David Allister

Stimson

Clifford Norgate

Generator (voice)

Andrew Lane

Foamasi

Tai Ling

Tourist