William Sylvester

as Dr. Heywood R. Floyd (archive footage) (uncredited)

as Leonard Driscoll

as Mr. Weldman

as Tom Henderson

as Dr. Heywood Floyd

as Paul Baxter

as Mark English

as Gordon Lonsdale

as Sam Slade

as Layton / Steve Ross

as Alec Douglas

as Dave Forrester

as Philip Vickers

as Texas

as Jimmy

as Mac

as Len Turner

as Giovanni