Watch it

“The Fence” (8 p.m., HBO). Emmy-winning documentary filmmaker Rory Kennedy examines the cultural, economic and environmental impact of the border fence with Mexico, and its many, many problems. Should be interesting.

“It’s Always Sunny in Philadelphia” (10 p.m., FX). Season premiere. The most hilarious, twisted, self-centered idiots on TV are back for a sixth season. Tonight, Mac decides he opposes gay marriage after his former trans-sexual girlfriend marries someone else. Meanwhile, the rest of the gang reaps the benefits of marriage and discover alley almonds.

“The League” (10:30 p.m., FX). Season premiere. The second season of a group of friends obsessed with fantasy football kicks off. Eh, that’s a lame way to describe it. How about this: The further sick, twisted exploits of a group of obscenely trash-talking friends for whom fantasy football threatens to ruin lifelong friendships and marriages. However it’s described, it’s funny. Tonight the gang holds their fantasy draft in Vegas. Which is weird, since I don’t know anybody who doesn’t hold their draft online. Come on, this isn’t the ’90s.

“Daily Show with Jon Stewart” (11 p.m., Comedy Central). Bill Clinton is the guest.

Record it

“The Apprentice” (8 p.m., KRON Ch. 4). Season premiere. No celebrities this time, just ordinary folks trying to get a job with Trump. Note the different channel, since NBC-11 is carrying the Giants game.

“Project Runway” (9 p.m., Lifetime). January Jones (“Mad Men”) is guest judge as the contestants design American sportswear.

Catch a score

Giants vs. Dodgers (7 p.m., NBC-11). Maybe tonight’s the night the Giants score a run. It could happen!

Skip it

“Nikita” (9 p.m., The CW). There’s a lot of potential with this show, but unfortunately, little of it is realized. On the bright side, there’s bound to be a cool shootout or two. Tonight, Nikita goes after a war criminal, and Alex is activated early.