The benefactor of the Stack Memorial Hospital dies after an operation. Ellery Queen investigates when it is revealed the cause of death was murder by strangulation.
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
