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.

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 scientist keeps his wife young by killing, stealing the bodies of, and taking the gland fluid from virgin brides.

Guests at a posh Berlin hotel struggle through worry, scandal, and heartache.

Heading up the Chisholm Trail with a small herd and just a few men, Breezy has his cattle rustled by Curley and his gang. Returning to Texas, Breezy convinces the ranchers to send their cattle north in one big herd guarded by a lot of men. Outnumbered, Curley has a plan to get the cattle.

Gildersleeve has jury duty.

Leon Errol and his wife try to prevent their nephew's romance.

When a Texas playboy is murdered in a New York City nightclub the Falcon investigates. When he learns that the victim was slipped rattlesnake venom, the trail leads to Texas, his own kidnapping and near death.

Someone is attempting to steal radium stored in a bank. Death by cobra venom connects a number of murders. Charlie Chan investigates.

A group of young men who work at an aviation factory begin to suspect that a doctor who runs an air ambulance service is secretly a spy transporting secret information from the plant to enemy agents.