An adventure serial presented in 12 chapters. Inventor Thomas Edmunds uses a super plane, 'The Phantom,' to protect his new anti-gravity invention, the Contragrav, from theft.

The pilots of a Royal Air Force squadron in World War I face not only physical but mental dangers in their struggle to survive while fighting the enemy.

James Kincaid controls the local water supply and plans to do away with the other ranchers. Government agent Sandy Saunders arrives undercover to investigate Kincaid's land swindle scheme, and win the heart of one of his victims, Fay Denton.

The film explores the story of the Bounty and is based on the 1932 novel Mutiny on the Bounty by Charles Nordhoff and James Norman Hall.

A young woman turns to Holmes for protection when she's menaced by an escaped killer seeking missing treasure. However, when the woman is kidnapped, Holmes and Watson must penetrate the city's criminal underworld to find her.

The Eagle uses sky writing to make threats against a corporation. Nathan Gregory owns a travelling fairground and is thought to be the Eagle. Craig McCoy is a pilot who goes looking for the Eagle when Gregory turns up missing.

When legendary hunter Bob Rainsford is shipwrecked on the perilous reefs surrounding a mysterious island, he finds himself the guest of the reclusive and eccentric Count Zaroff. While he is very gracious at first, Zaroff eventually forces Rainsford and two other shipwreck survivors, brother and sister Eve and Martin Towbridge, to participate in a sadistic game of cat and mouse in which they are the prey and he is the hunter.

When World War I comes to an end, three pilots find themselves on hard times. They wind up in Hollywood, where they work as stunt fliers for a sadistic director.

The Wrecker wrecks trains on the L & R Railroad. One of his victims is Larry Baker's father. Baker wants to find the evildoer, among a host of suspects, but it will be difficult since the Wrecker can disguise himself to look like almost anyone

Gabby Denton, a hard-drinking, down-on-his-luck drifter, seems to get a chance at redemption when his brother-in-law helps get him a job as a mechanic. Not realizing the garage he works for is actually a front for a stolen car ring, Gabby soon finds himself mixed up in both murder and a liaison with the boss's girl.

Famous auto racing champion Joe Greer returns to his hometown to compete in a local race, discovering that his younger brother has aspirations to become a racing champion.

When Texas Grant rides into town people think the supposedly dead Jim Rawlins has returned. After a confrontation with Utah Becker, Grant learns Jim's wife, Helen, is about to lose her ranch to Becker, so he decides to stay and pose as Rawlins in an effort to help her.

James Parker and Harry Holt are on an expedition in Africa in search of the elephant burial grounds that will provide enough ivory to make them rich. Parker's beautiful daughter Jane arrives unexpectedly to join them. Jane is terrified when Tarzan and his ape friends abduct her, but when she returns to her father's expedition she has second thoughts about leaving Tarzan.

Barnstorming pilots Speed Condon, Bill Adams, and Eddie Smith travel the country with their manager, Alec Dugan, performing at fairs and air shows and hawking rides for the locals. But when Speed's rambunctious flying results in tragedy, he gives up flying in despair and guilt. Alec tracks him down and hopes to get him back on his feet and back in the air.

John Drury saves Duke, a wild horse accused of murder, and trains him. When he discovers that the real murderer, a bad guy known as The Hawk, is the town's leading citizen, Drury arrested on a fraudulent charge.

William Poster writes a gossip column for the Morning Gazette. He will write about anyone and everyone as long as he gets the credit. He gets most of his information from his showgirl gal-pal, Peggy. Eventually Bill's reckless tattling gets him in deep trouble with friends and enemies, putting his career and life in jeopardy.

When delusional madman Roxor kidnaps a scientist in hopes of using his death ray to achieve world dominance, he is opposed by Chandu, a powerful hypnotist and yogi.

While on safari in an unexplored area of Africa, Trader Horn and Peru find missionary Edith Trent killed by natives. They decide to carry on her quest for her lost daughter Nina. They find her as the queen of a particularly savage tribe, and try to bring her back to civilization.

A mysterious master criminal known as The Voice plots with his gang to sabotage the Milesburg Oil Company, but the rightful heir has a secret army of her own to protect her rights.

Winnie Lightner is the head of a health clinic and has Joe E. Brown as one of her employees. Brown is a wrestler named JoJo and he is forced to enter the ring and face down a musclebound masked opponent (Frank S. Hagney). Making matters worse, the masked marauder is convinced that his wife has been fooling around with JoJo. JoJo is knocked out early in the proceedings, whereupon he dreams he's a sultan surrounded by harem girls. A romantic subplot involves Paul Gregory and Claudia Dell. Gregory works for Dell's father and Dell asks her father to give Gregory a promotion so that she can spend more time with him. When Gregory refuses to be promoted without earning the position, she threatens to have him fired and Gregory quits his job. Gregory attempts to start a new career as a championship wrestler and is trained by Lightner and Brown. When Dell finds out about this, she attempts to stop him and asks for his forgiveness. She pleads with him to not fight but he has already promised...

In the waning days of WWI, a U.S. "Mystery Ship," sets sail for the coast of Spain towing a submarine. Their mission is to find and sink a U-boat that has been especially effective in attacking Allied shipping. Posing as a harmless schooner, the mystery ship is in fact fitted with a formidable gun capable of sinking a U-boat. Stopping in the Canary Islands to refuel, the crew interacts with locals involved with Germans, and with Germans themselves, including the sister of the U-Boat commander, who is lurking offshore waiting for the coming battle.

Clint Belmet (Gary Cooper) is a bit of a firebrand and is sentenced to at least 30 days in jail, but his partners, Bill Jackson (Ernest Torrence) and Jim Bridger (Tully Marshall) talk a sympathetic Frenchwoman named Felice (Lili Damita) into telling the bumbling, drunken marshal that Clint had married her the previous night. Clint is released so he can accompany Felice on the wagon train heading west to California.

World War I ace Dick Courtney derides the leadership of his superior officer, but he soon is promoted to squadron commander and learns harsh lessons about sending subordinates to their deaths.

El Malo, notorious Mexican bandit, forces the Mayor of Sierra Blanca, Seth Landport, to open the safe and turn over to him 2,000 pesos, which the bandit gives a promissory note for to the Mayor. Seth rushes to the cantina where Sheriff Rankin is drinking, and the sheriff posts a reward for the capture of El Malo. El Malo informs his men of the reward. The bandit and his sidekick, Pedro, visit the cantina where Pedro resumes a former acquaintance with Dolores, while El Malo has his attention directed to a tango being performed by Carmita. El Malo pushes her dancing partner aside and finishes the dance with Carmita. Since Seth's description of him is not accurate, El May visits the sheriff and promises to deliver the wanted bandit to the cantina the following night. THe following morning, El Malo and Pedro depart, and, halting their horses on a hill, view the stagecoach being held up by a trio of outlaws.