Robert Newton

Dr. Clive Riordan

Phil Brown

Bill Kronin

Sally Gray

Storm Riordan

Naunton Wayne

Supt. Finsbury

James Harcourt

Aitkin (butler)

Betty Cooper

Miss Stevens (receptionist)

Allan Jeayes

The Colonel, blustery club member

Ronald Adam

Talkative, balding club member

Roddy Hughes

Bespectacled third club member, from Whitehall

Olga Lindo

Mrs. Humphries

Stanley Baker

Policeman at Garage

Russell Waters

Detective at Garage

Michael Balfour

American Sailor Promoting Book

Sam Kydd

Club steward

C.M. Pennington-Richards

(unconfirmed)

Ernest Clark

(unconfirmed)

Lyonel Watts

Club Member (unconfirmed)