William Gargan

Character: Ellery Queen

Margaret Lindsay

Character: Nikki Porter

Charley Grapewin

Character: Insp. Queen

Ralph Morgan

Character: Alan Rogers

Kay Linaker

Character: Margo Rogers

Edward Norris

Character: Stewart Cole

James Burke

Character: Sgt. Velie

Addison Richards

Character: Lester Younger

Charles Judels

Character: Corday

Andrew Tombes

Character: Bates

Claire Du Brey

Character: Housekeeper

Micheline Cheirel

Character: Marie Dubois

Ben Welden

Character: Fisherman

Milton Parsons

Character: Butler

Charles Lane

Character: Coroner