Worth Watching: Sept. 10-16

The Ellen DeGeneres Show Monday-Friday, 3 p. m. on NBC.

The Rachel Maddow Show Monday-Friday, 9 p.m. on MSNBC.

Glitter Pop diva Mariah Carey stars in this rags-to-riches film. 8 p.m. on Fuse.

Lord of the Rings: Fellowship of the Rings Out actor Ian McKellen plays the wizard Gandalf in the blockbuster adaptation of the popular epic. 8 p.m. on TNT.

Stand Up to Cancer Katie Couric, Diane Sawyer and Brian Williams host a fundraiser for cancer research with guest appearances by Stevie Wonder, Christina Applegate, Sharon Osbourne, Queen Latifah, Michael C. Hall and more. 8 p.m. on CBS, NBC, ABC and Fox.

Lord of the Rings: The Two Towers Out actor Ian McKellen plays the wizard Gandalf in the second installment of the epic trilogy. 8 p.m. on TNT.

Trantasia A documentary about “The World’s Most Beautiful Transsexual Pageant,” held in Vegas. 8 p.m. on Logo.

The Wanda Sykes Show The out comedian hosts this repeat of her weekly talk show with guests Chris Rock and Eddie Izzard. 11 p.m. on Fox.

Lord of the Rings: Return of the King Out actor Ian McKellen plays Gandalf in the third movie in the popular epic. 8 p.m. on TNT.

Mel B: It’s a Scary World The former Spice Girl tries to launch her own clothing line. 9 p.m. on the Style Channel.

How I Met Your Mother Out actor Neil Patrick Harris stars as the womanizing Barney in last season’s finale. 8 p.m. on CBS.

RuPaul’s Drag U The queens makeover a mother and her two daughters. Out actress Meredith Baxter guest judges. 9 p.m. on Logo.

Glee Repeats of this musical comedy starring out actress and Emmy winner Jane Lynch, featuring the Lady Gaga episode and the season finale. 8 and 9 p.m. on Fox.

America’s Got Talent The top acts compete. 9 p.m. on NBC.

Flipping Out Out house-flipper Jeff Lewis stars in this reality series. 9 p.m. on Bravo.

Fashion’s Night Out Oscar de la Renta, Diane Von Furstenberg, Justin Timberlake, Tory Burch and Anna Wintour appear in the one-hour primetime special that takes a look behind the scenes of the world’s largest fashion celebration. 10 p.m. on CBS.

Rachel Zoe Project Look for out assistant Brad in the reality series. 10 p.m. on Bravo.

America’s Next Top Model The new season of the reality modeling competition continues. 8 p.m. on CW.

America’s Got Talent A winner is chosen. 8 p.m. on NBC.

Eating Out: All You Can Eat The third movie in the “Eating Out” series. 8 p.m. on Logo.

The Real World: New Orleans Look for gay cast member Preston. 10 p.m. on MTV.

She’s Got the Look Out fashion expert Robert Verdi judges this reality competition for modeling hopefuls. 10 p.m. on TV Land.

Top Chef: Washington, D.C. The season finale of the cooking competition show. 10 p.m. on Bravo. Top Chef: Just Desserts A spin-off of the cooking competition show focusing on the sweets. 11 p.m. on Bravo.

Project Runway Openly gay Tim Gunn hosts this reality fashion competition. This week, the designers make resort attire. 9 p.m. on Lifetime.