Jason Mesnick, Renee, Treasure, Shelby and Naomi, The Bachelor Jason Mesnick, Renee, Treasure, Shelby and Naomi, The Bachelor

The Bachelor
8 pm/ET ABC
His first marriage ended in divorce and last spring, DeAnna Pappas spurned him on The Bachelorette, so will the third time be the charm for Seattle single dad Jason Mesnick? So far, so good. As he told reporters recently, he's already engaged to the bachelorette he picked at the end of the series that begins tonight with the traditional mansion meet-and-greet. (Taping wrapped up in November.) Of course, he didn't disclose his choice, but the field awaiting him does include four single moms. — Paul Droesch

For clips of The Bachelor, visit our Online Video Guide.

True Beauty
10 pm/ET ABC
From the creators of Punk'd and America's Next Top Model, executive producers Ashton Kutcher and Tyra Banks, comes a different kind of beauty contest. The hot cast (six women, four men) have to prove inner beauty as well as looks to win in this eight-episode test. Host Vanessa Minnillo (Total Request Live), Cheryl Tiegs and editor Nole Marin (Elle) are the judges. — Fred Mitchell

For clips of True Beauty, visit our Online Video Guide.

The Secret Life of the American Teenager
8 pm/ET ABC Family
The successful freshman drama makes a mid-season return and finds Amy listening to three little words she doesn't want to hear: "Get a job." Anne tells her this while explaining to her daughter that she's going to have to find a way to support her baby. Amy explores other options, which leads to her decision, with Ben, to get married. As these two plan a union, Anne and George get closer to dissolving theirs when Anne (who's just full of good news tonight) informs her husband that she wants a divorce. — Jennifer Sankowski

For clips of The Secret Life of the American Teenager, visit our Online Video Guide.

Gossip Girl
8 pm/ET CW
Last we saw Chuck Bass, he was pretty much a mess, coping with his father's death by drinking and pushing everyone away. That was actually the last time anyone saw Chuck, as he's been missing since the day of Bart's funeral. Tonight, his Uncle Jack (Dexter's Desmond Harrington) arrives in town to help his nephew — after he finds him, that is. Meanwhile, Blair attempts to move on by trying to get accepted into a ladies society, and Jenny heads back to private school. — Jennifer Sankowski

For full episodes of Gossip Girl, visit our Online Video Guide.

10 pm/ET Lifetime
They shop together, eat dinner together, and now these five friends unite to drop the pounds on Lifetime's new reality show. With the aid of a celebrity trainer and a psychologist, these ladies commit to a 90-day (and hopefully) 30-pound weight-loss program and weather the pitfalls and triumphs of this difficult task. At times serious, other times humorous, DietTribe brings sincerity to the reality landscape and is likely to have viewers cheering each woman along at every weigh in. — Rhoda Charles

For more Lifetime programs, visit our Online Video Guide.