William Powell
Nick Charles
Myrna Loy
Nora Charles
Keenan Wynn
Clarence "Clinker" Krause
Dean Stockwell
Nick Charles Jr.
Phillip Reed
Tommy Drake
Patricia Morison
Phyllis Talbin
Leon Ames
Mitchell Talbin
Gloria Grahame
Fran Page
Jayne Meadows
Janet Thayar
Ralph Morgan
David Thayar
Bess Flowers
Jessica Thayar
Don Taylor
Buddy Hollis
Warner Anderson
Dr. Monolaw
Bruce Cowling
Phil Brant
Connie Gilchrist
Bertha
Henry Nemo
The Neem
William Bishop
Al Amboy
Marie Windsor
Helen Amboy
Morris Ankrum
Inspector (uncredited)
James Burke
Policeman Callahan (uncredited)
Tom Dugan
Policeman Davis (uncredited)
James Flavin
Policeman Reardon (uncredited)
Esther Howard
Sadie (uncredited)
Clinton Sundberg
Mr. Purdy (uncredited)
Asta Jr.
Asta (uncredited)
Crew
Harry Crane
Additional Dialogue
Dashiell Hammett
Characters
Steve Fisher
Screenplay
Nat Perrin
Screenplay
James O'Hanlon
Additional Dialogue
Edward Buzzell
Director
Stanley Roberts
Story
Charles Rosher
Director of Photography
Irene
Costume Supervisor
Gene Ruggiero
Editor
Edwin B. Willis
Set Decoration
Cedric Gibbons
Art Direction
Douglas Shearer
Recording Supervision
David Snell
Music
Jack Dawn
Makeup Designer
Nat Perrin
Producer
Sydney Guilaroff
Hair Designer
Randall Duell
Art Direction