Ralph Bellamy

Character: Ellery Queen

Margaret Lindsay

Character: Nikki Porter

Charley Grapewin

Character: Insp. Queen

Noel Madison

Character: Gordon Cobb

Ann Doran

Character: Sheila Cobb

James Burke

Character: Sgt. Velie

Anna May Wong

Character: Lois Ling

Eduardo Ciannelli

Character: Count Brett (as Edward Ciannelli)

Frank Albertson

Character: Sanders

Charles Lane

Character: Doc Prouty

Russell Hicks

Character: Harry Walsh

Tom Dugan

Character: McGrath

Mantan Moreland

Character: Roy

Theodore von Eltz

Character: Jim Ritter