Dr. Bernard Adrian is a kindly scientist who seeks to cure a young woman's polio. He needs human spinal fluid to complete the formula for his experimental serum. Meanwhile, a vicious circus ape has broken out of its cage, and is terrorizing the townspeople. Can there be a connection?
Insurance agent-physician collects on policies of men murdered by a disfigured resident of the home for the blind where he acts as doctor-on-call.
A scientist keeps his wife young by killing, stealing the bodies of, and taking the gland fluid from virgin brides.
A chemical manufacturer is killed just after asking detective James Wong to help him. So Detective Wong decides to investigate this as well as two subsequent murders.
The latest assignment for respected detective Charlie Chan has come directly from the government and involves the disappearance of a scientist named Harper, who was working on an extremely important serum. When the scientist is killed, Chan must sort through all very likely suspects, including the man's sister and his butler.
It is prior to the commencement of World War II, and Japan's fiendish Black Dragon Society is hatching an evil plot with the Nazis. They instruct a brilliant scientist, Dr. Melcher, to travel to Japan on a secret mission. There he operates on six Japanese conspirators, transforming them to resemble six American leaders. The actual leaders are murdered and replaced with their likeness.
A seemingly charitable soup kitchen operator (who moonlights as a criminology professor) uses his Bowery mission as a front for his criminal gang. Police attempt to close in on the gang as they commit a series of robberies, murders and bizarre experiments on corpses.
When a troupe of showgirls with their impresario and press agent vacation at a Malibu Beach resort, two of them are garroted. Charlie takes on the case assisted by Number Two Son Jimmy and faithful chauffeur Birmingham Brown.
A struggling young singer falls for a nightclub owner whose father, a millionaire, is trying to shut it down.
A treasury agent on the trail of counterfeit money confides to fellow ocean liner passenger, Charlie Chan, that there have been two attempts on his life.
Chris Morrell, the guardian of half-Indian girl Nina, is helping her find her missing white father. so she can cash in on her late mother's oil lease. Outlaw Sam Black is after the girl and her father as well. Besides dealing with the Black gang, Morrell has to find another robber, Jim Moore, who switches clothes with him after he finds Chris unconscious from a fight with Sam Black. Along the way, he meets a lady who's the sister of Jim Moore, another bad hombre who's in cahoots with Jim Moore, and an old friend who takes in Nina and helps Chris locate Nina's father and fight off the various desperadoes
Little David Gordon lives in the jungle with his parents Ruth and Fred, along with their servant Nona. David likes living there while his father captures wild animals; he's made friends with Bomba the jungle boy, who has shown him a great deal about life in the jungle. One day two adventurers come looking for ancient treasure in the shadow of a live volcano.
The East Side Kids try to fix up a house for newlyweds, but find the place next door "haunted" by mysterious men.
The gang is sent to the Wilton Reform School after they are unjustly convicted of stealing a truck. Bill Collins, brother of co-leader Danny, becomes involved in a killing and, while also innocent, is convicted and sentenced to death. Through a series of events, Muggs, Glimpy, Danny and the rest of the gang, learn that Knobby, a henchman of Luke Manning, knows something about the murder.
In order to learn the location of a fabled Aztec treasure, a professor kidnaps his colleague, the only man able to read the ancient Aztec script that is supposed to reveal the location of the treasure. Charlie Chan and his #1 and #2 sons journey to the jungles of Mexico to find the victim and bring the kidnapper and his gang to justice.
A mad doctor (Bela Lugosi) and his helpers (John Carradine, George Zucco) lure girls to his lab for brain work, to help his wife.
During the Whitney High School student government election, a rich man’s son tries to pay his way into office with promises of new athletic uniforms. His desperate competitors decide to stage a series of song and dance spectacles to try to garner votes.
Shipping magnate Cyrus Wentworth, downcast over a disaster to his ocean liner 'Wentworth Castle' (carrying, oddly enough, an illicit shipment of Chinese bonds) is shot in his office at the very moment of kicking out his daughter's fiance Dick Fleming. Of course, Captain Street arrests Dick, but reporter Bobbie Logan, the attractive thorn in Street's side, is so convinced he's wrong that she enlists the help of detective James Lee Wong to find the real killer.
During World War II, a small plane somewhere over the Caribbean runs low on fuel and is blown off course by a storm. Guided by a faint radio signal, they crash-land on an island. The passenger, his manservant and the pilot take refuge in a mansion owned by a doctor. The quick-witted yet easily-frightened manservant soon becomes convinced the mansion is haunted by zombies and ghosts.
Thirteen years after a dinner party in which the thirteenth guest failed to arrive, the remaining guests are being murdered one by one, and their bodies being placed at the same dinner table in the appropriate seats they occupied thirteen years prior.
