Douglas Walton
as Lindsay Marriott
Otto Kruger
as Jules Amthor
Claire Trevor
as Helen Grayle
Dick Powell
as Philip Marlowe
Anne Shirley
as Ann Grayle
Mike Mazurki
as Moose Malloy
Miles Mander
as Mr. Grayle
Don Douglas
as Police Lieutenant Randall
Ralf Harolde
as Dr. Sonderborg
Esther Howard
as Jessie Florian
John Indrisano
as Chauffeur (uncredited)
Jack Carr
as Dr. Sonderborg's Assistant (uncredited)
Shimen Ruskin
as Elevator Operator (uncredited)
Ernie Adams
as Bartender at 'Florian's' (uncredited)
Dewey Robinson
as New Boss at 'Florian's' (uncredited)
Larry Wheat
as Grayle's Butler (uncredited)
Sam Finn
as Headwaiter (uncredited)