When Sach eats too much sugar, he goes into a trance whereby he's able to predict the future. Slip tries to make some money off of Sach by using him as a fortune teller in a carnival, until a mad scientist kidnaps Sach to use him in an intelligence-switching experiment with a monster.
Leo GorceySlip Mahoney
Huntz HallSach
Gabriel DellGabe Moreno
Alan NapierDr. Druzik
Jane AdamsNancy Marlowe
William BenedictWhitey
Bernard GorceyLouie
Glenn StrangeAtlas the Monster
Benny BartlettButch
David GorceyChuck
After Slip is drafted into the Marines, the rest of the gang volunteers so they can be with him. Sach discovers that the colonel knew his father and he is promoted. During a drill that he is putting the rest of the gang through, they find a soldier left for dead on the side of the road. Slip discovers a playing card next to the marine and traces it to Jolly Joe Johnson's gambling house. They suspect that the gambling house is cheating and set out to uncover the proof.
Sach is given a post-hypnotic suggestion that turns him into a championship prizefighter.
Slip and Sach are working for a local newspaper as a reporter and photographer, respectively. Slip wants to get the goods on a local gambling ring that is fixing sporting events, so he and Sach go undercover to expose the ring.
Slip invites his cousin Jimmy to stay with his family after he is released from prison. However, Jimmy soon gets mixed up with an auto-theft ring.
Slip (Leo Gorcey), Sach (Huntz Hall), Bobby (Bobby Jordan), Whitey (William Benedict) and Chuck (David Gorcey) unsuccessfully try to sell a dilapidated car to a street cleaner for a fabulous amount, so they can get enough money to save Louie's (Bernard Gorcey) Malt Shop. Sidewalk photographer Cathy Smith (Teala Loring) snaps a pictures of three bank robbers as they are fleeing a robbery but when the Bowery Boys and Cathy realize that Sach is also in the photograph, they break into the photo lab to destroy the negative, which might make the police think Sach was involved in the robbery.
Slip, Sach and the rest of the Bowery Boys enter a haunted house, where they engage in slapstick with a gorilla, a robot and a vampire
The Bowery Boys head west to clear Louie of an old murder charge that he had killed his gold-mine partner. Sach has the map to the gold mine painted on his back, and Blackjack McCoy has him kidnapped by Indian Joe. Gabe poses as a dangerous gunman, the Klondike Kid, while Slip is in charge of all the remaining loose ends.
A man wins $50,000 in a card game with gamblers, but is soon found dead and the money missing. Slip and Sach find the money near where the body was discovered, and soon find themselves the target of both the police and the gamblers.
The Bowery Boys find a lamp that has strange magic powers.
A ghost helps the Bowery Boys capture a gang of crooks led by a mad doctor.
The Bowery Boys take on British crooks when one of them thinks he's inherited a title.
The Bowery Boys--Slip, Sach, Bobby, Whitey & Chuck--start their own exterminating service, and get a job which takes them to a spooky old abandoned mansion in the middle of the night. Meeting up with pal Gabe and his new French bride, the boys are tormented by mad scientists who try to convince them the place is haunted and then kidnap Sach in order to place his brain inside a gorilla.
In order to be able to get the names of winning horses at the track, Sach agrees to sell his soul to the devil.
Sach is the exact double of a famous French scientist who has invented a powerful rocket fuel. Enemy agents, mistaking Sach for the scientist, attempt to kidnap him and get the formula for the fuel.
The Bowery Boys are enrolled in a fancy college by a pair of rich snobs who think they can turn the Boys into classy guys. Sach becomes a football star, and is kidnapped by gangsters to keep him out of the big game.
Slip and Sach go to prison to help a reporter with a story.
The Bowery Boys come to the rescue when a corrupt taxi company puts the squeeze on several independent drivers.
An overambitious shutterbug almost gets his lights put out permanently when he decides to snap a picture of a mob boss.
One of the Bowery Boys gains superhuman strength, and he cashes in by becoming a pro wrestler.
Sach and the gang baby-sit a bratty TV star.