The X-Files (8 p.m., Fox) – Tonight’s finale promises a cliffhanger, so does that mean more seasons are possible? Show creator Chris Carter, citing solid ratings for the limited-episode series, told International Business Times last week, “I can’t imagine there won’t be more ... But no specific conversations have been had.”
Crazy Ex-Girlfriend (8 p.m., CW) – Rebecca hopes to redeem herself by working on a case that she thinks will bring her closer to Josh.
Superstore (8 p.m., NBC) – In the season finale, Ben sends everyone into a frenzy by mentioning unions. (Also tonight, season finales for “Telenovela” and “Biggest Loser.”)
Becoming Mike Nichols (9 p.m., HBO) – A new documentary on award-winning filmmaker Mike Nichols. Read the full review of “Becoming Mike Nichols” – it’s definitely worth checking out.
Castle (10 p.m., ABC) – Castle is abducted and forced to solve deranged puzzles and mind games with strangers, as Beckett races to save him.