Sam Troughton

as Murray Guthrie

as Stephen Yarrick

as Donal McCabe

as Robespierre

as The Stone (voice)

as DI Brian Tarpey

as Dr. Henry Samson

as Thomas Massey

as Wilder

as Ed Jarman

as John Houseman

as Alexandr Akimov

as Mr Hobhouse

as Captain Meadows

as Charlie Morgan

as Dom

as Edmund

as Prince of Wales

as Jeff

as George

as Malcom Simmons

as Noel

as Much

as Nick

as David

as Thomas Parks

as Thomas Winter

as Tom Hadley-Clarke

as Policeman 2

as Thomas Stone

as Henry Marsh

as Self