"A man who has a talking mule gets a job on a newspaper, and both get mixed up in a murder trial."
Donald O'Connor
as Peter Stirling
Yvette Duguay
as Maria Scola
Gene Lockhart
as Tom Henderson
Nancy Guild
as Alberta Ames
William Harrigan
as Inspector Hansen
Silvio Minciotti
as Salvatore Scola
Lowell Gilmore
as Jefferson Garnet
Larry Gates
as Dan Austin
Hanley Stafford
as Dr. Goodrich
Gale Gordon
as Evans
Forrest Lewis
as Judge Stanley
Chill Wills
as Francis (voice) (uncredited)
Charles Flynn
as Jones
Arthur Lubin
Director
Oscar Brodney
Writer
Leonard Goldstein
Producer
Carl E. Guthrie
Cinematography
Russell A. Gausman
Set Decoration
Joan St. Oegger
Hairstylist
Joseph Gershenson
Music Director
Robert Pritchard
Sound
Bernard Herzbrun
Art Direction
Ruby R. Levitt
Richard H. Riedel
David S. Horsley
Special Effects
Leslie I. Carey
Bud Westmore
Makeup Artist
Rosemary Odell
Costume Design
David Stern
Characters
Milton Carruth
Editor