CW | 8:00 pm

Archie's (K.J. Apa) attempts to help Eric (guest star Sommer Carbuccia) deal with his PTSD forces the former to confront his own past trauma in the Army in the new "Chapter Eighty-Nine: Reservoir Dogs." Meanwhile, Betty and Tabitha (Lili Reinhart, Erinn Westbrook) hatch a scheme to lure truckers to Pop's as part of their strategy to find the Lonely Highway Killer. Elsewhere, Cheryl (Madelaine Petsch) extends an invitation to Kevin (Casey Cott), while Veronica (Camila Mendes) challenges Reggie (Charles Melton) to prove her wrong. Madchen Amick and Mark Consuelos also star.