Now that cults and the Gargoyle King are a thing of the past, Riverdale season 4 will have the kids focusing on their studies, and the show has tapped Supergirl's Sam Witwer to play a mysterious new teacher. Very few details have been revealed surrounding Riverdale's upcoming season, but a few were spilled during their panel at this year's San Diego Comic-Con. Showrunner Roberto Aguirre-Sacasa announced that Shannen Doherty would be joining the cast this year in a special guest-starring role. Her addition will be featured in season 4's premiere episode, titled "Chapter Fifty-Eight: In Memoriam," which will feature a special tribute to Luke Perry, who unexpectedly passed away earlier this year.
Perry and Doherty had known each other since the very beginning of their careers when they worked alongside one another in Beverly Hills 90210. His passing was one that shocked the cast, crew, and everyone close to him. On February 28, he was rushed to St. Joseph's Hospital in Burbank, California after suffering a stroke. Many fans and those involved with the series were curious as to how his death would be addressed in the show, and Aguirre-Sacasa reassured the SDCC crowd that it would be the first thing they tackle going into season 4. The creator's goal was to make the premiere episode as special as possible, and Doherty's addition was one that both Perry and Aguirre-Sacasa had planned since the show's beginning.
Now, another fresh face is entering the fray for Riverdale season 4. According to ComicBook.com, Sam Witwer from The CW's Supergirl is joining the teen drama as a new teacher named Mr. Chipping. He's a "lecturer at an upper-crust prep school that Jughead attends on scholarship," and is described as, "handsome, bookish and cool." But, like seemingly every character on this show, "there's a darkness hidden far beneath the surface," which begins to bubble upwards after he, "recruits Jughead for his seminar." During the show's Comic-Con panel, Cole Sprouse, who plays Jughead, explained that the school Mr. Chipping teaches at is, "the bane of [Jughead's] existence," and that the school itself, "serves as the setting for the flash-forward."
Considering his character's description, Witwer's Mr. Chipping could very well be one of season 4's villains. Recently, he closed out an arc on Supergirl season 4 as the big baddie Agent Liberty, otherwise known as Ben Lockwood, along with previously playing Davis Bloome/Doomsday in Smallville and Darth Maul in Solo: A Star Wars Story, so he'd be continuing his villainous streak if this were the case. But, until more details are revealed regarding the plot of Riverdale season 4, Mr. Chipping's character description is the most that fans will have to work off of.
In the past, Riverdale has culminated multiple villains to cover the vast ground of their now 22-episode seasons. Mr. Chipping could be one piece in a massive puzzle that Aguirre-Sacasa and the crew have planned for season 4, and it's sure to be a thrilling ride. Riverdale has upped the ante narrative-wise with each season, so fans can only hope that season 4 will be just as unabashedly wild as its predecessors and that Witwer is fully prepared for the insanity that lies ahead.