Ellery Queen and the Murder Ring

Ralph Bellamy

as Ellery Queen

Margaret Lindsay

as Nikki Porter

Charley Grapewin

as Insp. Queen

Mona Barrie

as Nurse Marian Tracy

Paul Hurst

as Page

James Burke

as Sgt. Velie

Leon Ames

as John Stack

George Zucco

as Dr. Edwin L. Jannery

Blanche Yurka

as Mrs. Augusta Stack

Charlotte Wynters

as Miss Fox

Tom Dugan

as Lou Thomas

Olin Howland

as Dr. Williams

Dennis Moore

as Dr. Dunn

Jean Fenwick

as Alice Stack

Pierre Watkin

as Crothers

Byron Foulger

as Hospital Orderly (uncredited)