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