Ellery Queen's Penthouse Mystery

Ralph Bellamy

Ellery Queen

Margaret Lindsay

Nikki Porter

Charley Grapewin

Insp. Queen

Noel Madison

Gordon Cobb

Ann Doran

Sheila Cobb

James Burke

Sgt. Velie

Anna May Wong

Lois Ling

Eduardo Ciannelli

Count Brett (as Edward Ciannelli)