Watch it

“Chuck” (8 p.m., NBC). It’s back from a three-week hiatus with six episodes to end the season. And there’s been a bit of a series reboot: Chuck and Sarah are finally together, and Morgan’s joined the spy team. It’ll be interesting to see how this plays out. Tonight Chuck and Sarah try to foil enemy spies while onboard a train in Europe.

“Gossip Girl” (9 p.m., The CW). We finally get to meet Serena’s father and Lily’s ex: the mysterious Dr. Van Der Woodsen (William Baldwin). Maybe he can clear up about a dozen different lame plotlines by explaining to everyone just what’s going on. And in a plot development that will shock no one, Dan gets rejected by the Tisch writing program, but Vanessa gets in.

Record it

“American Experience” (9 p.m.,  PBS). A detailed examination of the 1968 My Lai massacre, where U.S. soldiers killed some 300 unarmed Vietnamese villagers. Grim stuff, but it promises to be very good.

“House Hunters International” (10 p.m., HGTV). It’s a rerun, but one I missed the first 18 times around: A couple looks for a renovated loft in pre-war buildings in downtown Berlin. I’m just curious to see what that would look like, since the city was pretty much flattened.

Skip it

“Bizarre Foods with Andrew Zimmern” (7 p.m., Travel). Season premiere. I’m kinda over the whole let’s-eat-gross-things fad. Unless it’s Tony Bourdain eating squeezel.