The daughter of a man who has discovered radium on an African island is befriended by two people whose real goal is to keep the discovery to themselves.

A woman's love for and devotion to a married man results in her being relegated to the "back streets" of his life.

A 12-episode serial in which a son avenges the death of his father at the hands of corrupt politicians. He develops a wide variety of complex devices in his crusade . . . ray guns, robots and a 'vanishing belt.'

The fate of a city hangs upon the innocence of a girl charged with murder. A young, inexperienced, but adventurous newspaper reporter is bent on clearing her name by ripping the lid off a corrupt government machine.

Fireman Bob Darrow invents an original chemical fire extinguisher, and his rival, Dan Mitchell, for June Madison, also has his eyes on Bob's invention. Chapter 1: The Red Peril, Chapter 2: Flaming Hate, Chapter 3: The Fire Trap, Chapter 4: Death's Chariot, Chapter 5: The Avalanche, Chapter 6: The Jaws of Death, Chapter 7: Forest of Fire, Chapter 8: Blank Cartridges, Chapter 9: The House of Terror / The House of Horror, Chapter 10: The Depths of Doom, Chapter 11: A Flaming Death, Chapter 12: The Last Alarm.

Brawling cable layer Steve Reardon doesn't want to marry girlfriend Edith but he also doesn't want her to date other men.

A famous scientist and his beautiful daughter travel to Indochina to find an ivory disc that has the formula for a deadly gas engraved on it. An evil doctor and his gang are also looking for it.