1) Baseball, 1:05, 4:10 and 7:15 p.m. ET, Fox. It’s the first full day of the season, the first in which all 30 teams are scheduled. Fox – which desperately needs something new this summer – celebrates with a tripleheader. The Cubs (shown here with Anthony Rizzo and Kevin Bryant) host the Brewers at 1:05 p.m., the Dodgers host the Giants at 4:10 and then – with the teams that opened the season Thursday – the Nationals host the Yankees.
2) “Saturday Night Live,” 11:29 p.m., NBC. John Mulaney hosts this rerun, with David Byrne as the music guest, each for the third time. There’s a difference, though: Mulaney – a former “SNL” writer – has hosted in three consecutive seasons; Byrne guested at age 26, 37 … and 67. One assumes that 30-year gap gave him time to have new material.
3) “Magnum P.I.,” 8 p.m., CBS. We really don’t expect to see Magnum near an office cubicle. But when a corporate manager is murdered, he and TC must wear ties and pretend to be efficiency experts. Also, Rick wonders why Higgins faked an injury to avoid the case.
4) “NCIS: New Orleans,” 9 p.m., CBS. Far from his Louisiana turf, Pride must travel to New Yortk City, in this rerun. DNA evidence there points to a cold case from 20 years ago in New Orleans.
5) Sci-fi films, cable. Epics collide – “2001: A Space Odyssey” (1968) at 8 p.m. ET on Turner Classic Movies and a “Star Wars” marathon on TNT. “2001” is superb, No. 15 (two behind “Star Wars”) on the American Film Institute’s all-time list. Still, it needs to be seen in a theater. TNT has “Phantom Menace” (1999) at noon, “Rogue One” (2016) at 3 p.m., “The Force Awakens” (2015) at 6 and “The Last Jedi” (2017) at 9. At 12:17 a.m., it repeats “Phantom Menace,” starting a Sunday marathon.