12/04/1951
As novice detectives, Bud and Lou come face to face with the Invisible Man.
Bud Abbott
as Bud Alexander
Lou Costello
as Lou Francis
Nancy Guild
as Helen Gray
Arthur Franz
as Tommy Nelson
Adele Jergens
as Boots Marsden
Sheldon Leonard
as Boots Morgan
William Frawley
as Det. Roberts
Gavin Muir
as Dr. Philip Gray
Sam Balter
as Radio Announcer
John Daheim
as Rocky Hanlon
Walter F. Appler
as Professor Dugan (uncredited)
Bobby Barber
as Sneaky (uncredited)
Howard Banks
as Officer (uncredited)
Richard Bartell
as Bald Man (uncredited)
Phil Bloom
as Fight Spectator (uncredited)
John Breen
as Trainer (uncredited)
Milt Bronson
as Ring Announcer (uncredited)
Ralph Brooks
as Man at Bar (uncredited)
Steve Carruthers
as Reporter (uncredited)
Tom Coleman
as Dugan Detective School Graduate (uncredited)
Chester Conklin
as Counter Man (uncredited)
Bing Conley
as Trainer (uncredited)
Russ Conway
as Newspaperman (uncredited)
Paul Cristo
as Fight Spectator (uncredited)
Frank Dae
as Col. Duffie (uncredited)
Roy Darmour
as Man (uncredited)
Sayre Dearing
as Reporter (uncredited)
Jack Deery
as Hospital Visitor (uncredited)
James Dime
as Man in Gym (uncredited)
Ralph Dunn
as Motorcycle Cop (uncredited)
George Ford
as Reporter (uncredited)
Edward Gargan
as Milt (uncredited)
Harold Goodwin
as Bartender (uncredited)
Dick Gordon
as Man (uncredited)
Kit Guard
as Fighter on Rowing Machine (uncredited)
Bobby Hale
as Graduation Spectator (uncredited)
Chuck Hamilton
as Policeman (uncredited)
Stuart Holmes
as Fight Spectator (uncredited)
Kenner G. Kemp
as Policeman (uncredited)
Johnny Kern
as Trainer (uncredited)
Donald Kerr
as Fight Spectator (uncredited)
Perc Launders
as Cop (uncredited)
George J. Lewis
as Torpedo Al (uncredited)
Rory Mallinson
as Tough Guy in Bar (uncredited)
Paul Maxey
as Dr. Turner (uncredited)
Mathew McCue
as Graduation Spectator (uncredited)
Hans Moebus
as Restaurant Patron (uncredited)
Ralph Montgomery
as Photographer (uncredited)
Mike Morelli
as Training Spectator (uncredited)
William H. O'Brien
as Fight Spectator (uncredited)
Monty O'Grady
as Fight Spectator (uncredited)
Franklin Parker
as Photographer (uncredited)
Jack Perrin
as Dugan Detective School Graduate (uncredited)
Jack Perry
as Rocky's Handler (uncredited)
Victor Romito
as Waiter (uncredited)
Clark Ross
as Fight Spectator (uncredited)
Syd Saylor
as Waiter (uncredited)
Sammy Shack
as Fighter (uncredited)
Edith Sheet
as Nurse (uncredited)
Jack Shutta
as Attendant (uncredited)
Carl Sklover
as Lou's Handler (uncredited)
Billy Snyder
as Newspaperman (uncredited)
Brick Sullivan
as Dugan Detective School Graduate (uncredited)
Frankie Van
as Referee (uncredited)
Herb Vigran
as Stillwell (uncredited)
Billy Wayne
as Rooney - Rocky's Manager (uncredited)
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