Kenneth Williams

Agent Desmond Simpkins

Barbara Windsor

Agent Daphne Honeybutt

Bernard Cribbins

Agent Harold Crump

Charles Hawtrey

Agent Charlie Bind

Eric Barker

The Chief

Jim Dale

Agent Carstairs

Richard Wattis

Cobley

Eric Pohlmann

Emile Fauzak, the "Fat Man"

Victor Maddern

Milchmann

Judith Furse

Dr. Crow

John Bluthal

Head Waiter / Dr. Crow (voice)

Renée Houston

Funhouse Madame

Tom Clegg

Funhouse Doorman

Frank Forsyth

Professor Stark

Norman Mitchell

Native Policeman / Algerian Gent

Anthony Baird

Guard

Nora Gordon

Elderly Woman (uncredited)

Tutte Lemkow

Man in Marketplace (uncredited)