A “star” of the small screen longer than anyone could possibly care, Kate Gosselin really stretches the definition of “E! True Hollywood Story” (9 p.m., E!). But this “True” profile concentrates on that most Hollywood of traditions: divorce, as messy and public as possible.

Only time will tell whether constant media exposure will have any lasting or damaging effect on the Gosselin brood. But we can be assured that a tabloid media will be on hand to chronicle their every infraction.

• “OK, campers, rise and shine, and don’t forget your booties ’cause it’s cooooold out there today.” Yes, folks, it’s Groundhog Day, time for a 24-hour marathon of the 1993 comedy “Groundhog Day” running midnight to midnight today on Encore. It’s fascinating, if not fitting, that one of the year’s least observed and insignificant holidays should have inspired such a perfect little movie shot through with subtle, even spiritual meaning.

• The ability of the History Channel to meander into nonhistorical gibberish like “Bigfoot: The Definitive Guide” (8 p.m., History) never fails to depress me.

• For the 17th year running, Turner Classic Movies celebrates the Academy Awards with a monthlong festival of Oscar-nominated and Oscar-winning movies. Tonight celebrates Jack Nicholson, the male actor most often nominated for the golden statue. Look for “Five Easy Pieces” (7 p.m.), “Terms of Endearment” (9 p.m.), “Easy Rider” (11:30 p.m.) and “The Last Detail” (1:15 a.m.). Over the course of the month, TCM will broadcast 340 films considered Oscar-worthy.

• “Friends” shut down production nearly seven years ago, but its cast is all over the dial. Look for Matthew Perry on “The Daily Show with Jon Stewart” (10 p.m., Comedy Central) promoting his new Fox series “Mr. Sunshine,” debuting Feb. 9.

Jay Leno welcomes Matt LeBlanc (as well as Jennifer Lawrence and Ryan Bingham) on “The Tonight Show” (10:35 p.m., NBC). LeBlanc can be seen on the funny Showtime comedy “Episodes” on Sunday nights.

Courteney Cox can of course be found on her own sitcom “Cougar Town” (8:30 p.m., ABC, TV-PG). Lisa Kudrow serves as the executive producer of “Who Do You Think You Are,” the celebrity-genealogy series returning for a second season Friday night on NBC. And look for Jennifer Aniston to hit the promotional circuit for her upcoming movie “Just Go With It,” co-starring Adam Sandler.

Wherefore art thou David Schwimmer?

Tonight’s other highlights

• “American Idol” (7 p.m., Fox).

• Tony Hale guest stars as “Human Target” (8 p.m., Fox) returns to the schedule.

• Pre-dance jitters for Luke, Manny and everyone else on “Modern Family” (8 p.m., ABC).

• “Nova: Making Stuff” (8 p.m., PBS, check local listings) examines clean energy.

• An undercover agent slain on “Blue Bloods” (9 p.m., CBS).

•l A tycoon (Colm Feore) becomes a suspect in a teen’s abuse on “Law & Order: Special Victims Unit” (9 p.m., NBC).

• Ben’s back pages on “Off the Map” (9 p.m., ABC).