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 1 of 13 ADVERTISEMENT () Start Slideshow Share This Link Copy ← Use Arrow Keys → 1 Previous Next Start Slideshow RiverdaleTV