导演

James P. Hogan

编剧

Frederic Dannay

Manfred Lee

Gertrude Purcell

Eric Taylor

演员

拉尔夫·贝拉米

Ralph Bellamy

饰  Ellery Queen

Margaret Lindsay

饰  Nikki Porter

查利·格拉普文

Charley Grapewin

饰  Insp. Queen

Mona Barrie

饰  Nurse Marian Tracy

Paul Hurst

饰  Page

James Burke

饰  Sgt. Velie

Leon Ames

饰  John Stack

George Zucco

饰  Dr. Edwin L. Jannery

Blanche Yurka

饰  Mrs. Augusta Stack

Charlotte Wynters

饰  Miss Fox

Tom Dugan

饰  Lou Thomas

Olin Howlin

饰  Dr. WilliamsOlin How

Dennis Moore

饰  Dr. Dunn

Jean Fenwick

饰  Alice Stack

Pierre Watkin

饰  Crothers

Barlowe Borland

饰  Martin (butler) (unc

Don Brodie

饰  Hospital Desk Superv

Dick Curtis

饰  Policeman (uncredite

埃德加·迪林

Edgar Dearing

饰  Motorcycle(uncredite

Claire Du Brey

饰  Nurse in corridor (u

Byron Foulger

饰  Male nurse (uncredit

Edward Gargan

饰  Dumb henchman (uncre

Harrison Greene

饰  Hospital elevator re

Harry Tyler

饰  Henchman (uncredited

Pat West

饰  Ambulance attendant

摄影

James S. Brown Jr.

音乐

Lee Zahler

剪辑

Dwight Caldwell