WATCH: KJ Apa break silence on Luke Perry's death
Series showrunner Roberto Aguirre-Sacasa revealed that the October premiere episode will pay tribute to Luke and his character Fred Andrews.
Roberto tweeted what seems to be the front-page of the premiere's official script.
He wrote: "Probably the most important episode of #Riverdale we’ll do this year, if not ever. A tribute to our fallen friend. Thankful for this opportunity to honor Luke & Fred."