1) “Henry David Thoreau,” 9-11 p.m., PBS, concluding 9 p.m. Tuesday. Yes, Thoreau spent two years in a cabin (re-created here), writing eloquently about man and nature, But Ken Burns’ splendid film finds he’s much more interesting than that: Thoreau was a social guy who loved to mingle. He was a teacher, philosopher and pencil-maker, an abolitionist and a strong believer in personal freedom.
2) “American Idol,” 8-10 p.m., ABC. In an appropriate start to Easter Week, the contestants do songs of faith; 12 will advance. That’s followed at 10 by “The Rookie,” with Nolan’s ride-along going awry.
3) “St. Denis Medical,” 8 p.m., NBC. This stars cleverly and ends beautifully. In between, it’s hit-and-miss. Joyce is opening the new birthing center and Ron is trying to rush through his annual medical exam, so he can go on a fishing trip. Both efforts end up with OK comedy and some real emotion.
4) “The Fall and Rise of Reggie Dinkins,” 8:30, NBC. As Arthur (Daniel Radcliffe) flounders with his love life, Brina (Precious Way) is in social-media warfare with an ex-friend. The result has its moments, amid chaos. That’s followed by the start of the knockout rounds on “The Voice.”
5) “FBI” and “CIA,” 9 and 10 p.m., CBS. Necar Zadegan does double duty as Nikki Reynard. That’s her regular role (as the deputy chief of station) in “CIA,” but now she’s called to help the FBI with a smuggling crisis. Zadegan — born in Germany and raised in the U.S., with Iranian roots — has been a regular in “24,” “NCIS: New Orleans” and more.