Veteran character star Charles B. Middleton ("Ming the Merciless") escapes from a penitentiary after 15 years of imprisonment swearing vengeance on his former partner (Miles Mander) in this action adventure serial efficiently directed by the team of William Witney and John English. Kidnapping his former partner, Granville (Mander), Prisoner 39013 (Middleton) assumes the man's identity and sets out to destroy his various enterprises. At one of these, the Granville Amusement Pier, three athletes known as The Daredevils of the Red Circle swear vengeance when Prisoner 39013 blows up the pier, thereby killing the kid brother (Robert Winkler) of one of them. They align themselves with Granville's granddaughter (Carole Landis) and with a mysterious benefactor known only as The Red Circle. After 12 exciting chapters, the heroes finally destroy Prisoner 39013, leaving Gene Townley (Charles Quigley) and Miss Granville to plan their future together. A typically well-made Republic cliffhanger, Daredevils of the Red Circle starred not one but three heroes: Quigley, a former Columbia contract player, Herman Brix, who later changed his name to Bruce Bennett and enjoyed a modest leading man career at Warners, and stunt-man David Sharpe. Just starting out in films, leading lady Carole Landis was picked by none other than D.W. Griffith to star in One Million B.C. (1940), which earned her a studio contract with 20th Century Fox. Better known for her off-screen escapades, Landis, sadly, committed suicide in 1948.