Sylvester McCoy as The Doctor

Sophie Aldred as Ace

Kevin Eldon as Antimony

Leonard Fenton as Casmus

John Sessions as General Tannis

Stephen Fry as The Minister of Chance

Britta Gartner as Senator Sala

Peggy Batchelor as The Kingmaker

Jon Culshaw as Golcrum / Senator Hawk / President

Stephen Brody as Speedwell

Dave Hill as Nessican

Charlotte Palmer as Dr. Cain

Anthony Stewart Head as Saint Valentine

Jacqueline Pearce as Admiral Mettna

Gareth Jones as Campion

Andrew McGibbon as Captain Carne

Michael Yale as Lieutenant Suneel

Robert Rietti as Premier Bedloe

Nicholas Courtney as The Brigadier

Emma Ferguson as Magan

Huw Thomas as The President of Sanity

Nik Romero as Major Bander / Prime Minister

David Soul as Mission Control

Julienne Davis as Computer

Richard Garaghty as Man

Charlotte Palmer as Doctor Cane (voice)