A potential Ebola outbreak threatens Syd's life and hairstyle on Providence (8 p.m. Fri., NBC). On Popstars (8:30 p.m. Fri., WB), the meteoric rise of Eden's Crush continues. This week: an appearance on "Regis and Kelly"! The new cartoon The Fairly Oddparents (8:30 p.m. Fri., Nickelodeon) debuts. It features the adventures of a 10-year-old boy who has a pair of wacky fairy godparents. It's followed by another new cartoon series, Invader ZIM (9 p.m. Fri., Nickelodeon), about a tiny space alien who plans to take over the Earth. Hmm -- sounds a little "Pinky and the Brain"-ish to me. Val Kilmer hosts a rerun of Saturday Night Live (11:30 p.m. Sat., NBC), with music from U2. The not-really-for-kids cartoon series The Oblongs (7:30 p.m. Sun., WB) premieres. A poor family of mutants lives in a place called the Valley, which is polluted by the wealthy people who live on the Hill. Ah, an allegory. The episode airs again at 8:30 and 9:30 p.m. The Simpsons (8 p.m. Sun., Fox) embark on an African safari. It was only a matter of time. The new series The Incurable Collector (8 p.m. Sun., A&E) looks at what's hot in the world of antiques and collectibles. John Larroquette hosts. Mulder's back on The X-Files (9 p.m. Sun., Fox), but he's not exactly all the way back. On The Sopranos (9 p.m. Sun., HBO), Meadow meets Noah's parents and Ralph steps way out of line. Behind the Music (9 p.m. Sun., VH1) looks at the making of the movie "Saturday Night Fever." Helen is even more ruthless than usual in her prosecution of a carjacking-murder suspect on The Practice (10 p.m. Sun., ABC). The new reality series Bands on the Run (10 p.m. Sun., VH1) pits four aspiring bands in a competition for cash and stardom as they travel around the country performing.
Joan and Melissa Rivers have nice things to say about everyone, but especially Björk, on The Academy Awards Fashion Review (8 p.m. Sat., E!). Before Mark Burnett created "Survivor," he created Eco-Challenge (8 p.m. Sun., USA), a brutal 12-day team endurance race. Last year's Eco-Challenge, held in Borneo, is the subject of this four-night series (airs through Wednesday). The TV movie Semper Fi (9 p.m. Sun., NBC) is a fictional account of men and women undergoing Marine boot camp. This was supposed to be the pilot for a series, but Fox's "Boot Camp" got there first. The miniseries And Never Let Her Go (9 p.m. Sun., CBS) dramatizes the real-life case of a Delaware lawyer (Mark Harmon) suspected of murdering his girlfriend, a governor's aide. Costarring Paul Michael Glaser and Rachel Ward. The folks at E! pull an April Fools' Day prank with Joan Rivers: The E! True Hollywood Story (9 p.m. Sun., E!).
Women's NCAA Tournament (Final Four, 7, 9:30 p.m. Fri., ESPN; Championship, 8:30 p.m. Sun., ESPN)
Men's NCAA Tournament (Final Four, 5:30 p.m. Sat., CBS)
Pacers at 76ers (12:30 p.m. Sun., NBC)
Knicks at Lakers (5:30 p.m. Sun., NBC)
Capitals at Red Wings (7 p.m. Sun., ESPN2)
Orioles at Braves (1 p.m. Sat., TBS)
Rangers vs. Blue Jays in San Juan, Puerto Rico (4 p.m. Sun., ESPN)
Rosie O'Donnell (syndicated) Isabella Rossellini, Lara Flynn Boyle
David Letterman (CBS) Isabella Rossellini
Jay Leno (NBC) Renée Zellweger, Incubus
Politically Incorrect (ABC) Scott Thompson, Shannon Elizabeth
Conan O'Brien (NBC) Helen Hunt (rerun)
Craig Kilborn (CBS) Jennifer Love Hewitt, Shawn Colvin
All times Eastern unless noted.