Benny Hill

Hugo Dill

Belinda Lee

Frankie Mayne

David Kossoff

Zacco

Garry Marsh

Det. Inp. Hancock

Denis Shaw

Professor Stumpf

Ernest Thesiger

Sir Walter

George Margo

Barakov

Frederick Schiller

Gruber

Thorley Walters

Raymond Courtney

Stratford Johns

PC Coleman

Warwick Ashton

PC Roberts

Norah Blaney

The Actress

Charles Hawtrey

Disc Jockey

Nicholas Phipps

Scientist

Peter Bull

Scientist

Gibb McLaughlin

Scientist

Ernest Jay

Scientist

Harold Scott

Scientist

Terence Alexander

Radio Show Official (uncredited)

Irene Handl

Customer (uncredited)

Arthur Lowe

Shop demonstrator (uncredited)

Glyn Houston

Arresting Policeman (uncredited)

Jeremy Hawk

Himself

Philip Stainton

Frankie's Agent