The Mortified Sessions 10 p.m., Sundance
This show is about childhood embarrassment and the catharsis of purging it in public. We get to watch famous people confess to their most awkward early moments as they look through childhood artifacts such as diaries and letters. A lot of the material is superficial, but every now and then you get a little bit of a tear-jerker. Tonight is the season two premiere, and the guest is Busy Philipps (pictured), from “Cougar Town” and that opus of teen angst, “Freaks and Geeks.” Coming this season: Marc Maron, Jason Ritter, and Kristin Bauer van Straten from “True Blood.” Yes, the woman who plays vampire Pam was once a child.
How I Met Your Mother 8 p.m., Channel 4
I thought last week’s episode, about prenups and trust in relationships, was strong. The structure of the half-hour featured a lot of the show’s time-shifting wit, but more importantly, the end was honest and touching. We knew Barney and Quinn were doomed, and the episode brought the story line there smoothly. Oh maybe I can deal with yet another season of the show, after this one, but only if the writers promise to stay this good. Pictured: Josh Radnor (left) and Neil Patrick Harris.
Gossip Girl 9 p.m., Channel 56
Totally not spotted: Serena.
$24 in 24 10:30 p.m., Food Network
The adventures of Jack in the Box Bauer.
Truck U 10 p.m., Speed
A ticket, a gasket.Matthew Gilbert can be reached at firstname.lastname@example.org. Follow him on Twitter @MatthewGilbert.