Basil Sydney

as Inspector Philip Winton

Judy Gunn

as Claire Haines

Zoe Davis

as Mrs. Harris

Alastair Sim

as Police Sergeant 'Mac' McKay

Reginald Tate

as Hubert Perrin

Ian Fleming

as Henry Sanders

Tom Helmore

as Alfred Jerome

Martin Lewis

as William Gregg

C.M. Hallard

as Dickenson - Norman's Attorney

Aubrey Mallalieu

as Robert Norman

Ernest Borrow

as Superintendent Field

Sydney Moncton

as Globe Reporter

Albert Parker

as Movie Director (cameo appearance)(uncredited)