Never Forget to Lie 10 p.m., Channel 2
Filmmaker Marian Marzynski, director of “Shtetl,” was a Jewish child born in Poland, and he avoided the death camps of the Holocaust because he was hidden by Christians. In this episode of “Frontline,” Marzynski goes to a meeting of fellow survivors in Warsaw, where he and others recall the losses and the horrors they experienced as kids. “In our old bodies,” says Marzynski in the film, “we are still children.”
New Girl 9 p.m., Fox
In the season finale, Jess (Zooey Deschanel) and Nick (Jake Johnson) “make a decision about their relationship,” which is network-speak for “You have entered the shipper zone, where you will watch this couple be on again and off again, again and again, until the very last moments of the very last episode of the series.” Meanwhile, in the season finale, Schmidt tries to sabotage Cece’s wedding ceremony.
Weird or What? 9 p.m., Syfy
Flip or Flop 11 p.m., HGTV
Polygamy, USA 9 p.m., National Geographic
You can’t have one without the others.Matthew Gilbert can be reached at firstname.lastname@example.org. Follow him on Twitter @MatthewGilbert.