In Black Christmas, Hawthorne College is quieting down for the holidays. But as Riley Stone (Imogen Poots, Green Room) and her Mu Kappa Epsilon sisters-athlete Marty (Lily Donoghue, The CW's Jane the Virgin), rebel Kris (Aleyse Shannon, The CW's Charmed), and foodie Jesse (Brittany O'Grady, Fox's Star)-prepare to deck the halls with a series of