Supergirl climbs the Luthor family tree

Here’s what’s up in the world of TV for Monday, February 13. All times are Eastern.
Top picks
Supergirl (The CW, 8 p.m.): Supergirl is going with an origin story tonight. That’s right, it’s time to meet the “Luthors.” More specifically: “After Metallo breaks out of prison and frees Lillian Luthor, the police blame Lena for his escape and arrest her.” You know—little Luthor things. “Despite overwhelming evidence, Kara refuses to believe her friend is guilty and fights to clear Lena’s name. Flashbacks reveal how Lena came to be a Luthor.” You’ve got to love a good Luthor flashback episode of television. Even Smallville knew that one.
The Young Pope (HBO, 9 p.m.): Like we said before, it truly is a night of superheroes, and you can’t talk about that without talking about the one and only Young Pope. Tonight is the first season finale, with the “Tenth Episode.” No capes, but who needs capes when you’ve got papal capers? “Reunited with a changed Gutierrez at the Vatican, the pope considers an appropriate course of action regarding Archbishop Kurtwell. Father Tommaso gets a promotion, while Sister Mary takes on a new role. The prospect of a reconciliation leads the young pope to make an unexpected change of travel plans—and policy.” The fact that even the episode calls him “the young pope” is what really makes it all come together. This is the moment we’ve all been waiting for, and reviewer Eric Thurm promises to do The Young Pope proud. We’ve even cued up a song:
Martha & Snoop’s Potluck Dinner Party (VH1, 9 p.m.): We’re doing a theme, and our point here is that the combination of Martha Stewart and Snoop Dogg are a real life dynamic duo. Plus, it’s the first season winter premiere (we apparently missed the fall finale) of Martha & Snoop’s Potluck Dinner Party, and it’s “Something Fishy”: “Chefs Abe Hiroki and Masaharu Morimoto roll sushi with Martha, Snoop, Kathy Griffin and Mike Epps. Also: D.R.A.M. performs.”
Premieres and finales
Fashion Police: The 2017 Grammy Awards (E!, 8 p.m.): When it comes to the Grammys—or any music-related awards show, after all these years—we still only have one question: “What was Britney thinking?”