Colin Baker

The Doctor

Bonnie Langford

Mel Bush

Michael Jayston

The Valeyard

Lynda Bellingham

The Inquisitor

Honor Blackman

Professor Sarah Lasky

Michael Craig

Commodore Travers

Denys Hawthorne

Rudge

Yolande Palfrey

Janet

Malcolm Tierney

Doland

David Allister

Bruchner

Tony Scoggo

Grenville

Arthur Hewlett

Kimber

Simon Slater

Edwardes

Sam Howard

Atza

Leon Davis

Ortezo

Chris Clough