The story concentrated on a group of test pilots, busily experimenting with a revolutionary all-plastic airplane. Ace flyboy Brad Farrell (Richard Arlen) is determined to prove the practicality of the new aircraft, designed by Professor Blake (Thomas Ross), father of Brad's sweetheart Carol (Jean Parker). Back on solid ground, Brad must vie for Carol's attentions with his own brother, engineer Doug Farrell (Don Castle).
When the showboat hits town, two men use the parade as a distraction to rob the bank. Their accomplice is Pop, the clown from the showboat. He leaves the money on the boat and tells his daughter Patsy to bring it to him at a later stop on the river. Gene's investigation of a bank robbery takes him to the showboat where he becomes a performer. Gene and Frog try to find the money while helping Patsy and her father.
Rightful owner of the kingdom, the Duchess of Zona, is engaged in a power struggle with the evil General Gurko. Edmond, the son of Monte Cristo, dons many disguises to come to the aid of the Duchess.
In 1820 Spain, the son of a California nobleman comes home to find his native land under a villainous dictatorship. On one hand, he plays the useless fop, while on the other, he is the masked avenger Zorro.
Bill Hickok, assisted by Calamity Jane, is after a foreign agent and his guerrilla band who are trying to take over some western territory just as the Civil War is coming to a close.
Trouble in Colorado is tying up Union troops needed back east during the Civil War and Lieut. Burke is sent to investigate. Macklin and his gang are causing the problems and Capt. Mason joins them. When Burke catches up with them he also finds Mason, his brother.
American crime reporter John Jones is reassigned to Europe as a foreign correspondent to cover the imminent war. When he walks into the middle of an assassination and stumbles on a spy ring, he seeks help from a beautiful politician’s daughter and an urbane English journalist to uncover the truth.
Gulliver washes ashore on Lilliput and attempts to prevent war between that tiny kingdom and its equally-miniscule rival, Blefiscu, as well as smooth the way for the romance between the Princess and Prince of the opposing lands. In this he is alternately aided and hampered by the Lilliputian town crier and general fussbudget, Gabby. A life-threatening situation develops when the bumbling trio of Blefiscu spies, Sneak, Snoop, and Snitch, manage to steal Gulliver's pistol.
Knowing that is contains valuable helium gas, a gang of bad guys first tries to purchase the ranch which Gene straw-bosses. When that fails, they lay a hidden pipeline to snag the gas.
In his starring debut, Roy gets elected to Congress in order to bring water to the ranchers in his district. In Washington, he learns he needs the backing of a key congressman and gets that man to go west for an inspection trip. When the congressman is initially unimpressed, Roy gets the inspection party stranded without water to show the true conditions.
Adventuring author Jean Williams is living in the wilds of Alaska alongside the Eskimo people gathering material for her novel. She befriends several animals who become her loyal friends such as a pair of bear cubs whose mother has been killed by hunter Gaston Rogers, a talking raven and the bereaved collie Firefly who will not leave the grave of her master, a game warden killed in the line of duty. The community is imperiled by a pack of wolves and wild dogs, led by a wild dog called Swift Lightning, who are killing all the reindeer. With the supply of fresh meat gone, the Eskimos are migrating to lands with more food. Hunter Gaston agrees to take Jean to Nenana, Alaska, along with his furs by dog sled. Jean, who despises Gaston as being more savage and blood thirsty than the four-legged predators, is followed by her loyal animals.
Saunders with his Cattlemen's Protective Agency is running roughshod over the ranchers. Lawyer Larry Kimball is fighting him but he needs a rancher that will stand up with him against Saunders. He finds him when Lou Gehrig retires from baseball to take up ranching. Lou expects to relax on his ranch but quickly joins Larry in the fight.
Dare Rudd takes a shine to his cattleman cousin Tom's girlfriend who asks Tom to hire Dare to head the big cattle drive. Dare loses the money for the drive to cardsharps, but Tom wins it back, but Dare must save Tom's life.
Young Englishman inherits ranch which he wants to sell, but Gene's gonna turn him into a real westerner instead. When new owner Spud arrives from England, Autry convinces him not to sell the ranch but to raise horses for the Army. When both Autry's and Neale's bids are the same, the Colonel calls for a race to decide the winner. But that night Neale has Autry's stable burned.
Bob Carter, a member of the Foreign Legion, is glad to see his brother, Don, for the first time in ten years but is sorry that Don has joined the Legion. Bob, Don and Bob's buddies, Muggsy and Bilgey, go to a café and there Don falls for Nina, a singer in love with Bob. Bob doesn't know this and thinks she is Garccia's girl, and warns Don to have nothing to do with her. Don disregards the warning and Garcia discovers Nina and Don together and provokes Don into hitting him. Don is arrested and thrown into the company brig. Nina, with the aid of an Arabian sheik, Ul Ahmed, helps Don escape. Bob, Muggsy and Bilgey follow but are captured and taken to Ul Hamid's headquarters. The sheik tortures Don to force Bob to work some captured machine guns for him. Ah Hamid and his tribe attack the fort, but Bob manages to turn the machine guns against his captors, and the fort is saved.