1) “In the Heat of the Night” (1967), 8 p.m. ET, Turner Classic Movies. Two of our greatest actors (shown here) collide, in a well-crafted mystery. Sidney Poitier plays a big-city homicide cop, reluctantly helping a small-town Mississippi sheriff. Rod Steiger won a well-deserved Oscar in the latter role; there were also wins for best picture and the script, score and editing. It’s a potent Black History Montgh film, followed at 10 by “To Sleep With Anger” (1990).
2) “Magnum” marathon, 4:30 p.m. to 12:30 a.m., USA Network. On Sunday, “Magnum P.I.” jumps from CBS to NBC, with two reruns and two new hours. To get us ready, here are eight episodes from the CBS years. That starts with the pilot: Thomas Magnum (Jay Hernandez) and Juliet Higgins (Perdita Weeks), both with lethal skills, get off to a shaky start. It concludes with one of the final episodes, uncovering a possible crime by the late Nuzo.
3) “Star Trek Beyond” (2016), 8-11 p.m., CBS. Two days after Paramount+ launched its new “Star Trek: Picard: season, its sister network offers this movie, which scored with critics and at the box office. It’s the third film with rebooted versions of the original characters, including Chris Pine and Zacharty Quinto as Kirk and Spock. Other ,ovies include cartoons on Freeform and “Pulp Fiction” (1994) at 5:30 p.m. on IFC.
4) “Saturday Night Live,” 10 and 11:29 p.m., NBC. The first rerun is from 2003, with Christopher Walken hosting and the Foo Fighters as music guest. The second is from this season; Austin Butler, the “Elvis” star, makes his hosting debut, with music from Lizzo.
5) Sports surge: This is pro basketball’s all-star weekend on TNT, with the “skills challenge” (including dunking) at 8 p.m. ET today and the game at 8:30 p.m. Sunday. Today, that faces college basketball (Michigan State at Michigan) on Fox and hockey (Washington at Carolina) on ABC, both at 8 p.m. ET.