"Probably the most important episode of #Riverdale we'll do this year, if not ever."

Luke Perry will be remembered in the first episode of the upcoming season of Riverdale.  The 52-year-old actor, who played Archie's dad Fred Andrews, passed away in March after being hospitalised following a stroke. The show's creator Roberto Aguirre-Sacasa said this week on Twitter that the first episode of season four would be titled "In Memoriam." "Probably the most important episode of #Riverdale we'll do this year, if not ever," he said, sharing a photo of the script. "A tribute to our fallen friend. Thankful for this opportunity to honor Luke & Fred." This comes after Aguirre-Sacasa said that Perry would be "honoured" in the show last month.  Perry's character, Fred, was last seen in the episode which aired in North America on March 6. Since then, it had been mentioned that he has gone out of town. Aguirre-Sacasa explained to Variety that when they heard that the actor had passed away, most of season three had already been written - and they felt trying to squeeze in a scene would've been "doing him a disservice." However, he added that Riverdale "absolutely" plans to “honour Luke and explain what’s going on with Fred and why we haven’t seen him” in season four.