During Riverdale‘s San Diego Comic-Con panel on Sunday, executive producer Roberto Aguirre-Sacasa confirmed that the season 4 premiere will feature a special tribute to Luke Perry. Perry, who was on the show for three seasons, died in March. Additionally, it was revealed that Perry’s friend and former Beverly Hills, 90210 costar Shannen Doherty will guest star in a “special role” in the episode, which is titled “Chapter Fifty-Eight: In Memoriam.”