Sydney Greenstreet as Supt. George Edward Grodman

Peter Lorre as Victor Emmric

Joan Lorring as Lottie Rawson

George Coulouris as Supt. John R. Buckley

Rosalind Ivan as Mrs. Vicky Benson

Paul Cavanagh as Clive Russell

Arthur Shields as Rev. Holbrook

Morton Lowry as Arthur Kendall

Holmes Herbert as Sir William Dawson

Art Foster as PC Warren

Clyde Cook as Barney Cole

Jimmy Aubrey as Newsboy

Billy Bletcher as Gravedigger

Creighton Hale as Reporter

Colin Kenny as Sergeant

Leo White as Cabbie

Ian Wolfe as Jury Foreman

Howard Davies as Old Gentleman (uncredited)

Mark Strong as Coroner (uncredited)