Cast
Ralph Bellamy
Ellery Queen
Dennis Moore
Dr. Dunn
Tom Dugan
Lou Thomas
Olin Howland
Dr. Williams
Margaret Lindsay
Nikki Porter
Charley Grapewin
Insp. Queen
Paul Hurst
Page
George Zucco
Dr. Edwin L. Jannery
Charlotte Wynters
Miss Fox
Byron Foulger
Hospital Orderly (uncredited)
Mona Barrie
Nurse Marian Tracy
Jean Fenwick
Alice Stack
James Burke
Sgt. Velie
Leon Ames
John Stack
Blanche Yurka
Mrs. Augusta Stack
Pierre Watkin
Crothers