One Tree Hill (8pm, CW) - In the emotional series finale, the 10th anniversary of Tric is celebrated, and some former Tree Hill residents return for the festivities. "One Tree Hill" ran for nine seasons and was filmed in Wilmington. Pictured here, Austin Nichols as Julian and Sophia Bush as Brooke.

Best Friends Forever (8:30pm, NBC) - In the pilot of another throwaway NBC sitcom (see "Bent" below), a woman moves back to Brooklyn and in with her best friend after being served with divorce papers.

Bent (9pm, NBC) - The final two episodes of this great but under-appreciated sitcom air tonight. In the first, Alex fears Pete's slacker ways are resurfacing and Screwsie has Gary pet sit her boss's difficult cat. In the second episode, Alex dreams about Pete while on vacation with Ben, causing her to reexamine her feelings, and Walk gets ready to make his latest theater debut.

Happy Endings (9:30pm, ABC) - For the third week in a row, everything on ABC tonight is a repeat except for this gem, which has its second season finale. The gang attend another wedding and Penny is upset about not having a date, and Brad has a tough time breaking important news to Jane. Also, Max tries to muster the courage to hit the stage with his old all-male Madonna cover band.

CSI (10pm, CBS) - A man is gunned down in a casino at point-blank range and the CSIs shut down the building to find the killer.