The Daily Clarion hires detective story writer Steve Colt to investigate the deaths of a group of scientists working on an atomic rocket development project. Behind the killings is fortune teller Sombra, a spy from an Asian country intent on world domination, who is determined to pilfer the atomic rocket by luring workers from the project to her parlor and killing them with black widow spider venom when they refuse to cooperate.
Bruce Edwards
Virginia Lee
Carol Forman
Anthony Warde
Ramsay Ames
I. Stanford Jolley
Dave Anderson
Theodore Gottlieb
Virginia Carroll
Gene Roth
Sam Flint
LeRoy Mason
Forrest Taylor
Ernie Adams
Keith Richards
The Wolf Dog
Perils of the Royal Mounted
The King of the Kongo
The Phantom Rider
The Spider Returns
Canadian Mounties vs. Atomic Invaders
Dangers of the Canadian Mounted
Federal Agents vs. Underworld, Inc.
Government Agents vs Phantom Legion
King of the Circus
Perils of Nyoka
Radar Patrol vs. Spy King
The Lightning Raider
The Lost Express
Lucille Love: The Girl of Mystery
The Shielding Shadow
King of the Wild
The Adventures of Smilin' Jack
The Lost Special
Scouts to the Rescue
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