Julia Louis-Dreyfus stars in “The New Adventures of Old Christine” (7:30 p.m., CBS) as Christine, the divorced mother of 8-year-old Ritchie (Trevor Gagnon). Mother and son live with her seemingly unemployed and unattached brother, Matthew (Hamish Linklater), who serves as a pinch-hit babysitter and recipient of Christine’s many confessions, no matter how inappropriate or wince-inducing.

She and her ex-husband, Richard (Clark Gregg), get along great – in Christine’s opinion, “better than most married couples.” Apparently, Christine and Richard didn’t share much in the intimacy department, so little has changed since their divorce. At least that’s what she tells herself.

Christine’s bubble bursts when she discovers that Richard has a new girlfriend, a much younger and perkier woman, also named Christine (Emily Rutherfurd).

Now considered the “old” Christine, Louis-Dreyfus’ character goes about reinventing herself, dating men and contemplating intimacy with all of the awkwardness that entails. This should be a natural for Dreyfus, who turned making a fool of herself into an art form during her days as Elaine on “Seinfeld.”

¢ The Donald presents a car-dealing challenge on “The Apprentice” (8 p.m., NBC). Fans of the show may remember Raj Bhakta, the outspoken, preppy participant from several seasons back. Raj has recently accepted the Republican nomination to run for the House of Representatives in Pennsylvania’s 13th district, a seat currently held by Democrat Allyson Schwartz.

Tonight’s other highlights

¢ Minutes to go on “Prison Break” (7 p.m., Fox). New episodes return on Thursday.

¢ A retro Momma trades lives with a young modern on “Wife Swap” (7 p.m., ABC).

¢ Kentucky Derby winner Gary Stevens guest stars on “Wildfire” (7 p.m., Family).

¢ Hobbled by the attack, the CTU tries to regroup on “24” (8 p.m., Fox). RIP, Edgar.

¢ An indulgent aunt lets the house run amok on “Supernanny” (8 p.m., ABC).

¢ Start starving with the stars. Carnie Wilson hosts “101 Incredible Celebrity Slimdowns” (8 p.m., E!).

¢ “Extreme Homes Down Under” (7 p.m., HGTV) profiles some of the most futuristic and innovative domiciles in Australia and New Zealand.

¢ Sharon Lawrence and Tim Matheson star in the TV movie adaptation of “Augusta, Gone” (8 p.m., Lifetime), about a mother’s attempts to reclaim a teen lost to drugs.

¢ Suspicion falls on a man who already received an acquittal on “CSI: Miami” (9 p.m., CBS).