Ellery Queen's Penthouse Mystery

Ralph Bellamy

as Ellery Queen

Margaret Lindsay

as Nikki Porter

Charley Grapewin

as Insp. Queen

Anna May Wong

as Lois Ling

James Burke

as Sgt. Velie

Eduardo Ciannelli

as Count Brett (as Edward Ciannelli)

Frank Albertson

as Sanders

Ann Doran

as Sheila Cobb

Noel Madison

as Gordon Cobb

Charles Lane

as Doc Prouty

Russell Hicks

as Harry Walsh

Tom Dugan

as McGrath

Mantan Moreland

as Roy

Theodore von Eltz

as Jim Ritter