Popsugar Entertainment Riverdale Riverdale Season 3 Flashback Episode Pictures Riverdale: Archie and the Gang Transform Into Their Parents in the Retro Flashback Episode 17 October 2018 by Kelsie Gibson View On One Page Photo 13 of 13 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 13 Previous Next Start Slideshow RiverdaleTV