Kenneth Williams as Agent Desmond Simpkins

Barbara Windsor as Agent Daphne Honeybutt

Bernard Cribbins as Agent Harold Crump

Charles Hawtrey as Agent Charlie Bind

Eric Barker as The Chief

Dilys Laye as Lila

Jim Dale as Agent Carstairs

Richard Wattis as Cobley

Eric Pohlmann as Emile Fauzak, the "Fat Man"

Victor Maddern as Milchmann

Judith Furse as Dr. Crow

John Bluthal as Head Waiter / Dr. Crow (voice)

Renée Houston as Funhouse Madame

Jack Taylor as Thug

Tom Clegg as Funhouse Doorman

Bill Cummings as Thug

Gertan Klauber as Code Clerk

Frank Forsyth as Professor Stark

Norman Mitchell as Native Policeman / Algerian Gent

Anthony Baird as Guard

Derek Sydney as Algerian Gent

Patrick Durkin as Guard

Jill Mai Meredith as Cigarette Girl

Hugh Futcher as Bed-of-Nails Native

Angela Ellison as Cloakroom Girl

John Adams as Gate Security (uncredited)

Jack Arrow as Thug (uncredited)

Gloria Best as Funhouse Girl (uncredited)

Pauline Chamberlain as Train Passenger (uncredited)

Marian Collins as Amazon Guard (uncredited)

Maxwell Craig as Restaurant Patron (uncredited)

George Curtis as Security Guard (uncredited)

Sally Douglas as Amazon Guard (uncredited)

Heather Downham as Amazon Guard (uncredited)

Courtenay Elliott as Restaurant Patron (uncredited)

Hugh Elton as Restaurant Patron (uncredited)

Nora Gordon as Elderly Woman (uncredited)

Fred Haggerty as Dr. Crow's Assistant (uncredited)

Jean Hamilton as Amazon Guard (uncredited)

John Jardine as Guard (uncredited)

Philip Johns as Scientist (uncredited)

Judi Johnson as Funhouse Girl (uncredited)

Maya Koumani as Amazon Guard (uncredited)

Ken Lawton as Train Passenger (uncredited)

George Leech as Waiter (uncredited)

Tutte Lemkow as Man in Marketplace (uncredited)

Jane Lumb as Amazon Guard (uncredited)

Martin Lyder as Thug (uncredited)

Fred Machon as Restaurant Patron (uncredited)

Lou Morgan as Restaurant Patron (uncredited)

Jonathan Newth as Guard (uncredited)

Neil Osborne as Thug (uncredited)

Joe Phelps as Waiter (uncredited)

Joe Powell as Waiter (uncredited)

Charles Price as Guard (uncredited)

Christine Rodgers as Amazon Guard (uncredited)

John Smart as Train Passenger (uncredited)

Vicki Smith as Amazon Guard (uncredited)

Virginia Tyler as Funhouse Girl (uncredited)

Audrey Wilson as Amazon Guard (uncredited)