I’m not sure how much we don’t know, but here’s “Star Trek: The Unknown Story” (Reelz, 8 p.m.).
Turner Classic Movies spends the day saluting past Oscar winners for best supporting actor, with “Come and Get It” (6 a.m.), “Johnny Eager” (8 a.m.), “The Subject Was Roses” (10 a.m.), “Cool Hand Luke” (noon), “Topkapi” (2:15 p.m.) and “Spartacus” (4:30 p.m.). Tonight they turn to Oscar winners from the 1980s, with “Chariots of Fire” (8 p.m.), “Arthur” (10:15 p.m.), “Victor / Victoria” (12:15 a.m.) and “Fame” (3:45 a.m.).
NBA action includes Milwaukee at Golden State (ABC, 8:30 p.m.).
Hockey has St. Louis at Nashville (NHL, 12:30 p.m.), Philadelphia at Carolina (ABC, 3 p.m.) and Seattle at Montreal.
Golf has third round play in the Players Championship (NBC, 1 p.m.).
Auto racing includes the NHRA All-Star Shootout (Fox, 2 p.m.) and NASCAR’s United Rentals 200 (Fox Sports 1, 4:30 p.m.).
Lots of men’s college basketball conference tournaments today include UMBC at Vermont (ESPN2, 11 p.m.), Cornell at Princeton (ESPNU, 11 p.m.), Texas A&M at Arkansas (ESPN, 1 p.m.), Indiana at Iowa (CBS, 1 p.m.), Coppin State at Norfolk State (ESPN2, 1 p.m.), Saint Louis at Davidson (CBS Sports, 1 p.m.), Pennsylvania at Yale (ESPNU, 2 p.m.), Kentucky at Tennessee (ESPN, 3 p.m.), Tulane at Houston (ESPN2, 3 p.m.), Michigan State at Purdue (CBS, 3:30 p.m.), Richmond at Dayton (CBS Sports, 3:30 p.m.), Monmouth at Saint Peter’s (ESPN2, 5 p.m.), Memphis at SMU (ESPN2, 5 p.m.), Texas Tech at Kansas (ESPN, 6 p.m.), San Diego State at Boise State (CBS, 6 p.m.), Texas Southern at Alcorn State (ESPNU, 6 p.m.), Creighton at Villanova (Fox, 6:30 p.m.), Akron at Kent State (ESPN2, 7:30 p.m.), Northern Colorado at Montana State (ESPNU8 p.m.) Virginia Tech at Duke (ESPN, 8:30 p.m.), Louisiana Tech at UAB (CBS Sports, 8:30 p.m.), UCLA at Arizona (Fox, 9 p.m.), Texas A&M at Southeast Louisiana (ESPN2, 9:30 p.m.), Abilene Christian at New Mexico State (ESPNU, 10 p.m.) and CSU Fullerton at Long Beach State (ESPN2, 11:30 p.m.).
Women’s games include Ball State at Buffalo (CBS Sports, 11 p.m.), Manhattan at Fairfield (ESPNews, 11 a.m.), Columbia at Princeton (ESPNews, 5 p.m.), Louisiana Tech at Charlotte (CBS Sports, 5:30 p.m.).
Zoe Kravitz hosts a new “Saturday Night Live” (NBC, 11:30 p.m.) with musical guest Rosalia. The rerun at 10 p.m. is a 2019 show with Sandra Oh and Tame Impala.
Get a full hour of Rosalia on a 2020 episode of “Austin City Limits” (PBS, 11 p.m.).