Riverdale: Season five saw the teens go to prom and graduate. (Image: THE CW)
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Jughead is writing a book about the people of Riverdale and during his research, he found out about the myth of the Moth Man.
This was a creature, most likely an alien, which took a group of men but several years after they had been returned, they all died of cancer.
Meanwhile, Betty's sister Polly Cooper (Tiera Skovbye) has gone missing and during her investigation, the FBI trainee found out she wasn't the only one.
Women had gone missing when they've been on The Lonely Highway so it is believed there could be a serial killer on the loose.