Terry-Thomas
— Archibald Bannister
Sonja Ziemann
— Michele Cooper
Alex Nicol
— Edward Kennedy
Richard Briers
— Jamieson
Honor Blackman
— Sister Sheila Bryan
Guy Deghy
— Nick Ivanovitch
Carol White
— Beryl
Clive Morton
— Hatfield
Geoffrey Keen
— Foster
Martin Benson
— Rahman
Eduard Linkers
— Linkers
Vincent Ball
— Dr. Blake
Michael Ripper
— Yacht Skipper
Cyril Wheeler
— Stephen Cooper
Andrew Faulds
— Ralph
George Cormack
— Henry
Bruce Beeby
— Capt. Brook
Julie Alexander
— Stewardess
Meekah
— The Chimp
Barbara Hicks
— Margery (uncredited)
Jacqueline Jones
— Miss Forsythe (uncredited)
Hyma Beckley
— Party Guest (uncredited)
Roland Brand
— US Sergeant (uncredited)
Claire Collins
— Blonde Girl (uncredited)
Victor Harrington
— Airline Passenger (uncredited)
Chulam Mohammed
— Attaché (uncredited)
Gwenda Ewen
— (uncredited)
Pat Roberts
— (uncredited)