Story of an investment agent who embezzles a large sum from an estate, hoping to cover his crime by marrying the estate's heiress. The girl is already engaged, so he arranges to have the fiance killed. A mix up involving the society section of the newspaper places him in the sights of his own hired gun.

Roy Rogers, a Nevada State Ranger Captain in charge of the Rangers Reclamation Service, makes a trip to Las Vegas for the annual Heldorado Frontier Days Festival, as he wants to help his old friend Gabby Whittaker who originated the idea (at least, in this film).In Las Vegas, Roy meets heiress Carol Randall, who has been selected as the Queen of the Heldorado. Roy is informed that the F.B.I. wants an immediate investigation of the counterfeit thousand dollar bills that are being passed over the gambling tables at the casino.

The Dead End Kids join the war effort in this feature-length version of the Universal serial Junior G-Men of the Air. The fiendish Black Dragon Society, led by the sinister Baron (perennial B-movie villain Lionel Atwill) plots to pave the way for an Axis invasion of the U.S.A. by destroying America's defenses. When their plans are discovered by the Dead End Kids, the gang is too suspicious of "the coppers" to ask for help. The FBI send in their Junior G-Men to stop the spies, but when one of the Dead Enders is kidnapped, the two groups must work together to smash the Black Dragons once and for all!

Bill Burnett, a resident of Bali, visits New York City, meets and falls in love with Gail Allen, the successful manager of a Fifth Avenue shop, who is determined to remain free and independent. Bill proposes, Gail declines and Bill goes home to Bali. But a young girl, Rosie, and Tony the Window Cleaner, who dispels advice on every floor, soon have Gail thinking maybe she was a bit hasty with her no to Bill's proposal. Ere long she discovers that she does love Bill and can't live without him. She goes down to Bali to give him the good news. He learns that he is soon to marry Noel Van Ness. She goes back to New York City.

The Canadians have discovered a valuable substance called Compound X, which can cure infantile paralysis. When a country at war with Canada learns that Compound X also contains magnetic properties that could aid them in their warfare against the British, they send agents to infiltrate Canada and steal a large quantity of the substance. It's up to Sgt. King (Allan Lane) and his Mounties to track down the agents and put an end to their scheme.

The nefarious Dr. Fu Manchu searches for the keys to the tomb of Genghis Khan, in order to fulfill a prophecy that will enable him to conquer the world. His nemesi, Dr. Nayland Smith and his associates fight to keep the evil doctor from getting his hands on the keys. In 1943 the serial was edited together into a feature movie also called Drums of Fu Manchu.

A mad scientist named Dr. Satan plots to steal key pieces of technology to enable him to build an army of robots based on his prototype to conquer America. The only one standing in his way is Bob Wayne, who fights Satan as the enigmatic Copperhead. Mysterious Doctor Satan is a 1940 film serial named after its chief villain. Doctor Satan's main opponent is the masked mystery man, "The Copperhead", whose secret identity is Bob Wayne, a man searching for justice and revenge on Satan for the death of his step-father. The serial charts the conflict between the two as Bob Wayne pursues Doctor Satan, while the latter completes his plans for world domination.

Someone has absconded with $4,000,000 worth of diamonds, and that someone may very well be a passenger on the Bombay Clipper.

A group of street kids battle a terrorist gang led by a Japanese spy.

Tom King Jr. seeks to discover who murdered his father, a Texas Ranger; the trail leads to a network of Axis spies.