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“Chuck” (8 p.m., NBC). It’s a big two-hour season finale. Shaw, now loaded with the Evil Intercept, and the Ring come after Chuck & Co., putting Chuck’s father and sister in danger. And there’s big changes in store for the Buy More. It’s been a pretty great season, and it looks like it’ll go out with a bang. No lie: It looks explosion-laden.

“Law & Order” (10 p.m., NBC). After 20 seasons, the end is finally here. Olympic gold-medal-winning skier Lindsey Vonn guest stars.

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“How I Met Your Mother” (8 p.m., CBS). In the season finale, Lily and Marshall get one step closer to having a baby, and Robin might have to move to Chicago for her dream job.

“24” (8 p.m., Fox). In the two-hour series finale, Jack tries to block the peace treaty from being signed, and kills anyone in his way. Who, I’m guessing, is pretty much everyone but Chloe. And there are sure to be a few nice big explosions along the way.

“Dhani Tackles the Globe” (8 p.m., Travel). Linebacker Dhani Jones travels to Scotland to take part in the national sport there: Getting blackout drunk and getting into a bar fight.

“True Life” (10 p.m., MTV). “Resist the Power! Saudi Arabia” chronicles four young Saudis who defy their government and resist the country’s conservative institutions. Sounds brave, but an easy way to end up in a Saudi prison.

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“The Bachelorette” (9 p.m., ABC). Ali chose her job at Facebook over Jake last season. Now she realizes Facebook is lame and comes back, looking for a man. Ugh.