An American pilot impulsively joins His Majesty's Royal Air Force in Britain in an attempt to impress his ex-girlfriend.

This is a shortened version of the 1945 Republic serial "The Purple Monster Strikes," which was released to television in 1966.

Prof. Millard pretends to be dead and helps Jeff King ferret out Vulcan, the evil traitor at the science academy. Donning his Rocket Man costume King goes from one hair raising rescue to the next in order to keep the newly invented Decimator out of the clutches of Vulcan and his minions.

Jim Fletcher, waking up from a coma, finds he is to be given a court martial for treason and charged with informing on fellow inmates in a Japanese prison camp during WWII. Escaping from the hospital he tries to clear himself by enlisting the aid of Martha Gregory, widow of a service buddy he was accused of informing on. Helped also by Ted Niles, a surviving fellow prisoner, he gets closer to finding the answers he needs, and becomes ensnared in a grandiose scheme involving his Japanese ex-prison guard, $10,000,000 of US currency forged by the Japanese and a burgeoning crime network poised to wreak havoc throughout southern California.

In the 18th century, the pirates of Madagascar, lords of the Republic of Libertatia and masters of the Indian Ocean, live in an impregnable natural fortress, killing, robbing and plundering with impunity, so the British Navy hatches a daring plan to destroy them.

The Invisible Man's grandson uses his secret formula to spy on Nazi Germany.

A stock broker embezzles a million bucks and plans to take off to Shanghai. A number of obstacles stands in his path, however.

Hoppy and his pals arrive in a remote town to investigate the counterfeiting of both U.S. and Mexican money; his only clues are the name "Mordigan" and a drawing of a comet. He quickly finds out that Mordigan is the town "boss"; but what or who is "the comet", and why are Mordigan and his henchmen intent on persecuting a young woman, her drunken brother, and her deathly ill sister-in-law who've also just arrived in town?

A jewel thief and a con artist are rivals in the theft of a valuable diamond and gem necklace in Bombay and as the Japanese Army invades China.

Sir Arthur Blake has inherited title and lands from his brother. He also has his orphaned nephew Benjamin working for him as a bonded servant. While he believes the lad was born out of wedlock and so cannot claim the inheritance, he is taking no chances. Benjamin eventually rebels against his uncle and sets sail to try and make his fortune. This may enable him to return to prove his claim to being the rightful heir to the estate.