In Riverdale’s upcoming sixth season, the long-running CW Archie adaptation is finally living up to its crossover potential by calling Kiernan Shipka’s Sabrina Spellman in for a little assistance.

Perdomo’s character in Chilling Adventures of Sabrina was a cousin ... of the Sweetwater River from Riverdale. Due to a binding spell, he had been trapped in Spellman Mortuary for 75 years ...

One of Perdomo’s most famous roles was as Ambrose Spellman ... s “Riverdale,” and employed a more spooky and salacious tone than its forerunner — although some of the original “Sabrina ...