Inspired no doubt by real life serial murderer Gordon Cummins, convicted and hanged in 1942 for killing four women during wartime London blackouts, Curt Siodmak’s script for this Republic Pictures B-movie gives the story a nationalist twist. He also changed the victims to a group of well-connected men who die from poison. Lead actor John Abbott is revealed as the killer about ten minutes in. His weapon is a syringe concealed inside of a pipe. From there, we’re left to watch his exploits as he kills off his carefully selected targets in an air raid shelter and on a train. The only mystery is his motive, which is saved for the climax. Like every Republic programmer from the time, this film comes and goes in a flash, not even lasting an hour, and features a cast of familiar faces for old movie freaks. Frequent B-movie detective Lloyd Corrigan represents Scotland Yard with a sturdy performance and a faint attempt at an English accent. Anita Bolster, Republic’s go-to woman when they need an old crone, and old silent comedy performer-turned-character-actor Billy Bevan and his handlebar mustache show up in small roles. Meanwhile, B-movie workhorse director George Sherman counts this among seven films that he churned out for that year.