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TV This Week, March 17-23: ‘The OA: Part II,’ March Madness and more

March Madness is in full effect with the first full day’s worth of match-ups at the “2019 NCAA Basketball Tournament.” 9 and 11:30 a.m., 4 and 6:40 p.m. CBS; 9:30 a.m., noon, 4:15 and 6:55 p.m. truTV; 10:20 a.m., 12:50, 3:45 and and 6:15 p.m. TNT; 10:50 a.m., 1:20, 4:15 and 6:45 p.m. TBS; more games Fri.-Sat on CBS, TBS, TNT and truTV