"A young doctor is determined to expose the killer when a surgeon is found stabbed to death in a hospital elevator."
Ricardo Cortez
as George Lambert
Kay Linaker
as Sally Keating
John Eldredge
as Dr. Harrigan
Mary Astor
as Lillian Cooper
Joseph Crehan
as Lieut. Lamb
Frank Reicher
as Dr. Coate
Anita Kerry
as Agnes Melady
Phillip Reed
as Dr. Simon
Robert Strange
as Peter Melady
Mary Treen
as Nurse Margaret Brody
Bill Elliott
as Kenneth Martin
Don Barclay
as Jackson - the Drunk
Johnny Arthur
as Mr. Wentworth
Joan Blair
as Ina Harrigan
Joan Barclay
as Nurse
Nick Copeland
as Nestor - Policeman and Driver
Roger Gray
as Herbert - the Morgue Attendant
Eddie Larkin
as Interne
Ellen Lowe
as Nurse Foster
Stanley Mack
as Ambulance Orderly
Charles Marsh
Ned Norton
as Morgue Worker
Henry Otho
as Martin's Detective Escort
Mickey Rentschler
as Nosy Boy
Sam Rice
as Bald Patient
John J. Richardson
as Second Reporter
Mary Russell
as Nurse Bertha
Ferdinand Schumann-Heink
as Orderly
Harry Seymour
as First Reporter
Frank Shannon
as Police Sergeant
Eddie Shubert
as Joe - Policeman
Arthur Stone
as Horace Munn - City Editor
Martha Tibbetts
as Nurse Jonsie
Sy Bartlett
Screenplay
Peter Milne
Frank McDonald
Director
Arthur L. Todd
Director of Photography
Mignon G. Eberhart
Story
Leo F. Forbstein
Music Director
William Clemens
Editor
Robert M. Haas
Art Direction
Charles Belden
Dialogue