Billy Mauch
Penrod Schofield
Robert J. Mauch
Danny
Dick Purcell
Tex Boyden
Gene Lockhart
Mr. Schofield
Kathleen Lockhart
Mrs. Schofield
Hugh O'Connell
Professor Caligostro
Charles Halton
Mr. Bitts
Bernice Pilot
Delia
Jackie Morrow
Rodney Bitts
Philip Hurlic
Verman
Carole Landis
Girl at Fair (uncredited)
Sonny Bupp
Monk
Glen Cavender
Truck Driver Giving Penrod a Lift
James Conaty
Dinner Guest
Jack Cunningham
Jack
Gloria Fisher
Amy Perkins
Jack A. Goodrich
Attendant
Eddie Graham
Second Reporter
John Harron
Spieler at Carnival
Peter Lind Hayes
Weight Guesser at Carnival
Stuart Holmes
Banker Dinner Guest
Don Hulbert
Chuck
Frank Jaquet
Sheriff Bart in New Mexico
Ethan Laidlaw
Bus Driver
Billy Lechner
Donald
Al Lloyd
Sheriff's Deputy / Jailer
Roger McGee
Roger
Edmund Mortimer
Dinner Guest
Jack Mower
Matt
Spec O'Donnell
Carnival Patron
Paul Panzer
Mexican Rancher Giving Penrod a Lift
John J. Richardson
Man Warning Matt That the Balloon Was Up
Cliff Saum
Police Officer Kicking the Professor
Jerry Tucker
Jerry
Meredith White
Scarlett Washington
Lottie Williams
Woman Watching Reporter Interview
Tom Wilson
Brill
Jack Wise
First Reporter
Billy Wolfstone
Piggy
Lillian Yarbo
Mrs. Washington