The female lead Liz Renay was a friend of Bardo's and had just finished a 27-month prison sentence on Terminal Island for perjury involving her then-boyfriend, gangster Mickey Cohen.
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Subsequent reissues of the film (under the title The Maniacs Are Loose) added a color prologue with famed hypnotist Ormond McGill (billed as "The Amazing Ormond"), as well as extended color sequences of a "hypnodisc" during the moments where Steckler and company would burst out into the audience.
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After the success of Steckler's first independent feature, The Incredibly Strange Creatures Who Stopped Living and Became Mixed-Up Zombies (1963), he and producer George J. Morgan decided to cash in on the "psycho-killer" craze in Hollywood, brought upon by Alfred Hitchcock's Psycho.
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