Tom Mitchell is an insurance investigator and Fire Capt. Joe Dugan is chief of the police department's arson troubleshooters. Tom and Joe team up to solve a particularly vicious series of deliberate fires. A man has been killed in one conflagration, so the villains have a murder rap hanging over them.

A young girl goes to New York to find a band leader who has stolen all the songs she wrote and is passing them off as his own.

Flagwaving story of a new American destroyer, the JOHN PAUL JONES, from the day her keel is laid, to what was very nearly her last voyage. Among the crew, is Steve Boleslavski, a shipyard welder that helped build her, who reenlists, with his old rank of Chief bosuns mate. After failing her sea trials, she is assigned to the mail run, until caught up in a disparate battle with a Japanese sub. After getting torpedoed, and on the verge of sinking, the Captain, and crew hatch a plan to try and save the ship, and destroy the sub.

Ambassador Joseph Davies is sent by FDR to Russia to learn about the Soviet system and returns to America as an advocate of Stalinism.

Falsely convicted of murder, young Robert Draper escapes custody during a practice blackout drill. Under cover of darkness, Draper hopes to find the real killer, who turns out to be a member of a Nazi sabotage ring. Completed shortly before America entered WW2.

A bunch of waterfront youths pursue the Sea Raiders, a gang of saboteurs.

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.

El Puma, a Mexican desert guide, escorts an archaeological expedition headed by Professor Lucius Lloyd through the Indian badlands of Mexico. Marian, the professor's niece accompanies the party as only she can translate the Aztec writings in the diary of her father, murdered on a similar expedition six years previous. The professor is murdered by a knife, and the weapon is recognized as the property of El Puma. Magpie, a Federal Investigator, knows that El Puma is really "Lightnin' Bill' Carson, a former federal agent who has been missing since Marian's father was slain. The reluctant Magpie believes that his old pal is guilty. Carson sets out to prove otherwise.

Escaped Prisoner 39013 impersonates the rich and influential Horace Granville, allowing him to create a variety of disasters. Fortunately, he is thwarted repeatedly by three daring circus daredevils.

Mandrake and his team attempt to prevent "The Wasp" from stealing and using a new Radium invention.

Hall is after Dennison's land and hires the Shooting Kid to finish him off. The Marshal sends Tex to help Dennison, but the Kid has been helped by Tex in the past and changes sides.

Bill Carson assumes the identity of gang leader Trigger Mallory in order to fool his gang and his girlfriend.

Trailing the men that murdered his father, Bob Archer finds a man in a gunfight. He helps him to escape only to be knocked out by him and captured by the Sheriff.

A story of cattle rustling and double identities.

Chasing jewel thieves, Captain Carson and Magpie head for the border where Carson, posing as a Chinaman, opens a store that buys jewelry. To flush the thieves into the open, Carson wins all their money at poker. They agree to sell him the jewels but plan to kill him and keep both the jewels and the money.

Lightning Carson's nephew has been falsely accused of murder. To get in with the gang, Lightning poses as a Mexican. He also appears as himself making his costume changes at his sister's ranch. Just as he about to bring in the gang, a henchman finds evidence of his masquerade and arrives to expose the hoax.

Cowboy star Ken Maynard is Jim "Trigger" Morton, in town undercover while pursuing the man who framed him for robbery. But a well-placed shot tames a band of scofflaws and gains Morton the sheriff's badge. Now, he's riding on both sides of the law. The line is further blurred when old buddy Chuck offers evidence of Morton's innocence in exchange for a blind eye to Chuck's impending postal heist in this classic Western.

A government agent sets out to capture a gang of airmail bandits who use a death ray to blow planes out of the sky.

Millionaire Larry Duane is posing as his own chauffeur while touring the West and meets Molly Hennessey. They have a small romance until it is ended when her father strikes oil and moves his family east to satistify his wife's social aspirations. Larry also return east to close his estate for the summer, but stays on, still posing as the chauffeur, when he learns that Molly's family is renting the place.

A 15 episode serial in which Blake battles the "Scorpion" over possession of a 'death ray' machine.

Sir James Blake has retired from Scotland Yard so that he can assist his niece Hope and her friend Jerry in developing an apparatus they have invented. Sir James thinks that their invention has the potential to prevent wars, and plans to donate it to the League of Nations. But a gang of criminals led by the elusive "Scorpion" steals the device, and Blake and his associates must recover the invention and determine the identity of the "Scorpion".