Wednesday's TV highlights: The CW's 'Riverdale' on KTLA

Modern Family A Comic-Con-type event lures Phil and Mitchell (Ty Burrell, Jesse Tyler Ferguson), but once there, Phil ends up making a very serious misstep for any fan in the season finale of the hit comedy. Sofia Vergara, Julie Bowen, Ed O’Neill, Eric Stonestreet, Sarah Hyland, Ariel Winter and Rico Rodriguez also star, with guest star Jane Krakowski. 9 p.m. ABC