1) “Saturday Night Live” season-finale, 11:29 p.m., NBC. Natasha Lyonne (shown here) – a streaming star via “Orange is the New Black” and “Russian Doll” – gets her first chance to host. The music guest is Japanese Breakfast, led by Korean-American musician-author Michelle Zauner. Also, “Weekend Update” anchors Colin Jost and Michael Che have a season-finale tradition of making each other read rude jokes.
2) “Planet Earth: Dynasties II” opener, 8 p.m., BBC America. The BBC people are brilliant at nature films, mixing gorgeous settings with smart narration. An all-day marathon has reruns of past gems, then pauses to debut this series, which meets a different species each week. Tonight we’re in Patagonia, where puma quadruplets (a rarity) are raised by their mom. She battles predators and 100-mph winds, in a terrific opener.
3) Sports overload. The seasons overlap, with the winter sports now in their playoffs. Basketball has Miami and Boston at 8:30 p.m.ET on ABC; hockey has Colorado and St. Louis, at 8 p.m.ET on TNT. Meanwhile, there’s soccer on Fox …horse racing and football on NBC … boxing on ESPN (9 p.m.) and Showtime (10) … and NASCAR and baseball on Fox Sports1.
4) “King Richard” (2021) and “George Carlin’s America Dream,” 5:30 and 8 p.m., HBO. First is Will Smith’s subtly perfect performance, as the father of tennis stars Venus and Serena Williams. Then is the second half of Judd Apatow’s profile of a comedy mastert. And at 9:50, catch a rerun of the “Time Traveler’s Wife” series-opener.
5) More movies. Some of tonight’s better films go back a ways. There’s “Breakfast Club” (1985) at 5:45 p.m. on AMC, “Home Alone” (1990) at 8:50 on Freeform and “The Fugitive” (1993) at 9 p.m. on Sundance.