CW | 8:00 pm

The citizens of Riverdale are happily preparing for their upcoming Independence Day parade when Archie (K.J. Apa) gets a phone call that will change his life forever — the one no son ever wants to get, in the Season 4 premiere "Chapter Fifty-Eight: In Memoriam." That sets the somber tone for the hour, which is a farewell to both Fred Andrews, Archie's TV dad, and actor Luke Perry, whose sudden death last March stunned his colleagues and fans. Lili Reinhart, Camila Mendes and Cole Sprouse also star.