One Day at a Time

CBS | 9:00 pm

After Alex (Marcel Ruiz) accidentally catches his mother (Justina Machado) in a compromising position, Penelope decides it's time to sit down with her son for a talk about healthy human sexuality in "Boundaries," the first of two back-to-back episodes. That effort is complicated, however, by Lydia's (Rita Moreno) shocked and judgmental old-school perspective. Then, in "One Halloween at a Time," Lydia finds something life-altering in the kitchen trash. Todd Grinnell and India de Beaufort also star.