This season of Riverdale will feature a flashback episode exploring the relationships of the show's adult characters during their time in high school. In a fortuitous bit of casting, the part of the younger Hiram Lodge, played as an adult by Mark Consuelos, will be played by Consuelos' son Michael in the episode, according to Entertainment Weekly.
As for the teen versions of Riverdale’s other adult characters, most will be portrayed by the core cast. For example, KJ Apa, who plays Archie Andrews, will play Archie’s father Fred Andrews (played as an adult by Luke Perry) in the flashback episode.
No airdate for the episode has been announced.