Cast: Adams Ernie; Alban John; Anderson Dave; Bailey William; Barron Robert; Chesebro George; Dale Arvon; Edwards Bruce; Flint Sam; Gordon Dick; Green Duke; Jerome Jerry; Jolley I. Stanford; Lackteen Frank; Landon Harold; Loftin Carey; Mapes Ted; Mason LeRoy; O’Connor Frank; O’Shea Jack; Perkins Gil; Phillips John; Price Stanley; Reeves Bob; Richards Keith; Roth Gene; Steele Tom; Steers Larry; Sullivan Charles; Taylor Forrest; Terrell Ken; Theodore Brother; Van Sickel Dale; Warde Anthony; White Frank; Wilke Robert J.; Wolfe Bud; Ames Ramsay; Carroll Virginia; Forman Carol; Lee Virginia; Stevens Laura; Wynne Peggy; Frankovich M.J.; Adreon Franklin; Dickey Basil; Duffy Jesse; Shor Sol; MacBurnie John; Bennet Spencer Gordon; Brannon Fred C.; Bell Sr. Cliff; Starr Sam; Baker John E.
Taglines: ATOMIC ENERGY SECRETS STOLEN! (original poster)
Lightning-quick reporter attempts to overcome thieves…risking his life at the hands of the deadly Black Widow! (original poster)
Storyline: 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.