SpongeBob SquarePants (8:30 p.m. Fri., Nickelodeon) has a special episode in which viewers vote for one of three endings. Who is SpongeBob SquarePants? Well, he's a sponge, he's square, he wears pants and he's darn cute. 20/20 (10 p.m. Fri., ABC) profiles three gay couples raising families. The other "Revenge of the '80s" marathons have been pretty lame, but this one has potential: Four and a half hours of Square Pegs (10 p.m. Fri., Nickelodeon), the short-lived sitcom about freakish and geekish high schoolers starring Sarah Jessica Parker in her awkward stage. Back in 1982, this show was too cool for the room. Potential classic episode alert: Conan O'Brien hosts Saturday Night Live (11:30 p.m. Sat., NBC). On King of the Hill (7:30 p.m. Sun., Fox), Peggy's role as Luanne's sponsor for a sexual abstinence program leads to a shocking discovery for Hank. Lisa is tormented by a bully (Kathy Griffin) on The Simpsons (8 p.m. Sun., Fox). On The Sopranos (9 p.m. Sun., HBO), Tony has a Proustian moment, Svetlana feels the wrath of Janice and Christopher undergoes a mob rite of passage. Behind the Music (9 p.m. Sun., VH1) remembers the making of "Flashdance." What a feeling! The Practice (10 p.m. Sun., ABC) has a crossover with struggling ABC drama "Gideon's Crossing." Complications in her pregnancy prompt Ellenor to seek the counsel of her old friend, Dr. Ben Gideon (Andre Braugher).
Steve Harvey, Sidney Poitier and ex-president Bill Clinton are three of the honorees at the NAACP Image Awards (8 p.m. Fri., Fox). Dr. Nancy Snyderman reports on women and stress in an ABC News Special (8 p.m. Sat., ABC). Robin Hood's daughter plots a daring rescue of her dad and his merry men in the "Wonderful World of Disney" offering Princess of Thieves (7 p.m. Sun., ABC). Keira Knightley and Malcolm McDowell star. The woolly mammoth specimen unearthed in last year's special returns for further study in Land of the Mammoth (8 p.m. Sun., Discovery). The new TV movie The Amati Girls (8 p.m. Sun., Fox Family) stars Mercedes Ruehl, Sean Young, Paul Sorvino and Mark Harmon in the tale of four adult sisters who face a family tragedy with laughter, tears and pasta. The 1869 R.D. Blackmore romance Lorna Doone (8 p.m. Sun., A&E) gets another adaptation. Amelia Warner and Richard Coyle play the star-crossed lovers of the feuding Doone and Ridd clans. Director Rodrigo Garcia's indie film Things You Can Tell Just by Looking at Her (8 p.m. Sun., Showtime) was originally intended for the big screen, but has a cable showcase instead. Calista Flockhart, Glenn Close, Cameron Diaz, Holly Hunter, Amy Brenneman and Kathy Baker head the power-packed cast in vignettes about the lives of several California women. They may be headed for a strike, but tonight, they make merry: The Screen Actors Guild Awards (8 p.m. Sun., TNT) honor the best movie and TV performances of the year, and bestow a lifetime achievement award on Ossie Davis and Ruby Dee. The two-part miniseries The Lost Empire (9 p.m. Sun., NBC) is a special effects-laden telling of an ancient Chinese fable by the producers of "Gulliver's Travels." Thomas Gibson, Bai Ling and Russell Wong star. But viewer beware: Networks are usually so optimistic about splashy productions like this, they air them during sweeps -- but it ain't sweeps. Dead Men Talking: An "Autopsy" Special (10 p.m. Sun., HBO) is the perfect followup to that "Sopranos" episode at 9.
Heat at Knicks (12:30 p.m. Sun., NBC)
Avalanche at Stars (3 p.m. Sat., ABC)
Stars at Avalanche (8 p.m. Sun., ESPN)
ACC Tournament (Noon, 2 p.m., Fri., ESPN; 7 p.m. Fri., ESPN2; 1:30 p.m., 3:30, Sat.., ESPN; 1 p.m. Sun., ESPN)
Big Ten Tournament (12:30 p.m., 2:30, 10, Fri., ESPN2; 2:30 p.m., 4:45 Sat., CBS; 3:30 p.m. Sun., CBS)
Big East Tournament (7 p.m., 9, Fri., ESPN; 8 p.m. Sat., ESPN)
Mountain West Tournament (Midnight, Fri., ESPN; 10 p.m. Sat., ESPN)
Atlantic 10 Tournament (6 p.m. Sat., ESPN)
Big Sky Tournament (9 p.m. Sat., ESPN2)
SEC Tournament (1 p.m. Sun., CBS)
NCAA women's tournament selection (5 p.m. Sun., ESPN)
NCAA men's tournament selection (6:30 p.m. Sun., ESPN)
NCAA tournament pairings (6:30 p.m. Sun., CBS)
Rosie O'Donnell (syndicated) Conan O'Brien, Jane Kaczmarek
David Letterman (CBS) Matthew McConaughey (rerun)
Jay Leno (NBC) Jennifer Lopez, Freddie Prinze Jr. (rerun)
Politically Incorrect (ABC) Rhea Perlman, Craig Ferguson
Conan O'Brien (NBC) Matthew Broderick, Horatio Sanz (rerun)
Craig Kilborn (CBS) Kathy Griffin (rerun)
All times Eastern unless noted.