In 1978, a woman went on the ABC show The Dating Game and almost met with a tragic fate, as this video recounts.
Cheryl Bradshaw chose Rodney Alcala on camera over two other contestants, but when the show finished filming she refused to actually go on a date with him, saying he was too "creepy."
Her instinct saved her life: it turns out that Alcala was a serial killer and rapist who strangled his victims until they lost consciousness, then waited for them to wake up. He'd repeat this process over and over until the victims were dead.
Watch this video for chilling footage from the retrospectively chilling episode of The Dating Game, featuring a serial killer.