Dick Powell as Philip Marlowe

Claire Trevor as Helen Grayle

Anne Shirley as Ann Grayle

Otto Kruger as Jules Amthor

Mike Mazurki as Joe "Moose" Malloy

Miles Mander as Leuwen Grayle

Douglas Walton as Lindsay Marriott

Donald Douglas as Police Lt. Randall

Ralf Harolde as Dr. Sonderborg

Esther Howard as Jesse Florian

Ernie Adams as Bartender at "Florian's" (uncredited)

George Anderson as Detective (uncredited)

Edward Biby as Club Patron (uncredited)

Jack Carr as Dr. Sonderborg's Assistant (uncredited)

Tom Coleman as Police Clerk (uncredited)

Ralph Dunn as Detective (uncredited)

Sam Finn as Headwaiter (uncredited)

Rudy Germane as Club Patron (uncredited)

Fred Graham as Man (uncredited)

Bill Hamilton as Man (uncredited)

Paul Hilton as Boy Getting Laundry (uncredited)

John Indrisano as Amthor's Chauffeur (uncredited)

Daun Kennedy as Girl in Bar (uncredited)

Donald Kerr as Taxi Driver (uncredited)

King Lockwood as Club Patron (uncredited)

Paul Phillips as Detective Nulty (uncredited)

Dewey Robinson as New Boss at "Florian's" (uncredited)

Shimen Ruskin as Elevator Operator (uncredited)

Larry Wheat as Grayle's Butler (uncredited)