Jeffrey Byron as Luther Starling

Larry Cedar as Roger Pike

Roy Kinnear as Bidley

Lee Montague as Vorg

Mona Washbourne as Aunt Lydia

David Kossoff as Prof. Buchinski

Frank Windsor as McGuffin

Walter Gotell as Simmons

Nigel Davenport as Arthur Minton

Dudley Sutton as Goetz

David Battley as Peters

Julian Orchard as Driscoll

Kathleen Harrison as Elderly Lady

Percy Herbert as Ship's Captain

Don Fellows as General

Bruce Boa as Colonel

Wolfe Morris as Dr. Krause

Milos Kirek as Kaplan

André Maranne as Duvalier

Rita Webb as Cockney Woman

George Pravda as Kolenkov

Minah Bird as Narcotics Agent

Mike Grady as Courier

Burt Kwouk as Man at Meeting