The Bachelorette / 8:00pm (7) Part of the usual suspense of any season finale of this show is whether the given bachelorette receives a marriage proposal, but it’s already known Rachel Lindsay leaves the show as an engaged woman, so it’s a matter of who pops the question as the series ends its 13th round here. Of course, she must choose between the last two candidates first, so be prepared to see and hear much soul-searching. Chris Harrison is the host. The “After the Final Rose” special follows.
Mom / 9:00pm (13) Finding Adam (William Fichtner) with marijuana before they share intimacy makes Bonnie (Allison Janney) worry that’s the only way he can be with her in “Sparkling Water and Badinkers.” When she learns of the situation, Christy (Anna Faris) appoints herself as intermediary. Guest stars include Diane Delano (“Northern Exposure”). Mimi Kennedy, Jaime Pressly and Beth Hall co-star.
Midnight, Texas / 10:00pm (4) Lem (Peter Mensah) has a reunion in the new episode “Lemuel, Unchained,” but it’s not one he particularly wants. Those he encounters again are vampires, and Manfred and Olivia (Francois Arnaud, Arielle Kebbel) try to determine exactly why they’ve come to Midnight. Fiji and Bobo (Parisa FitzHenley, Dylan Bruce) go their own way in trying to ensure that the visitors cause no harm. Sarah Ramos, Jason Lewis and Yul Vazquez also star.
Escaping Polygamy / 10:00pm (A&E) 2:03am (A&E) In the Season 3 premiere, “Family Under Fire,” Jesse, a father desperate to help his family escape from an organization that all but forces its members into a life of polygamy, turns to Jessica and Andrea for help. Unfortunately, an explosive secret about Jesse’s dark past in that same group places the entire team in danger.
Peter Mensah stars in “Midnight, Texas” Monday on NBC.