Billy Mauch

Penrod

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 (uncredited)

Glen Cavender

Truck Driver Giving Penrod a Lift (uncredited)

James Conaty

Dinner Guest (uncredited)

Jack Cunningham

Jack (uncredited)

Gloria Fisher

Amy Perkins (uncredited)

Jack A. Goodrich

Attendant (uncredited)

Eddie Graham

Second Reporter (uncredited)

John Harron

Spieler at Carnival (uncredited)

Peter Lind Hayes

Weight Guesser (uncredited)

Stuart Holmes

Banker Dinner Guest (uncredited)

Don Hulbert

Chuck (uncredited)

Phyllis Hurst

(uncredited)

Frank Jaquet

Sheriff Bart (uncredited)

Muriel Kearney

(uncredited)

Ethan Laidlaw

Bus Driver (uncredited)

Billy Lechner

Donald (uncredited)

Al Lloyd

Sheriff's Deputy / Jailer (uncredited)

Roger McGee

Roger (uncredited)

Edmund Mortimer

Dinner Guest (uncredited)

Jack Mower

Matt (uncredited)

Spec O'Donnell

Carnival Patron (uncredited)

Paul Panzer

Mexican Rancher Giving Penrod a Lift (uncredited)

Johnnie Pirrone Jr.

Sam (uncredited)

John J. Richardson

Man Warning Matt That the Balloon Was Up (uncredited)

Cliff Saum

Police Officer Kicking the Professor (uncredited)

Jerry Tucker

Jerry (uncredited)

Meredith White

Scarlett Washington (uncredited)

Lottie Williams

Woman Watching Reporter Interview (uncredited)

Tom Wilson

Brill (uncredited)

Jack Wise

First Reporter (uncredited)

Billy Wolfstone

Piggy (uncredited)

Lillian Yarbo

Mrs. Washington (uncredited)

Penrod and Sam

Penrod and His Twin Brother

Penrod's Double Trouble