Paul Darrow
— Kerr Avon
Jan Chappell
— Cally
Michael Keating
— Vila Restal
Jacqueline Pearce
— Servalan
Peter Tuddenham
— Zen / Orac (voice)
Steven Pacey
— Del Tarrant
Josette Simon
— Dayna Mellanby
Cy Grant
— Hal Mellanby
Alan Lake
— Chel
Sally Harrison
— Lauren Mellanby
Michael Sheard
— Klegg
Doyne Bird
— Harmon
John Hollis
— Lom
Michael Crane
— Mall
Primi Townsend
— Zee
Julia Vidler
— Barr
Richard Franklin
— Federation Trooper
Michael Melia
— Federation Trooper
Catherine Chase
— Nurse
Helen Blatch
— Receptionist
Pat Gorman
— Death Squad Trooper
Max Faulkner
— Death Squad Trooper