Tonight On The OC...

Kaitlin fails a class presentation and is forced to work with Will (guest-star Chris Brown), a smart band geek at Harbor. When Kaitlin thinks she can get Will to do her homework for her, he challenges her and sparks fly. Bound by their new commitment, Seth and Summer move forward with their plans, regardless of how they really feel. Meanwhile, Sandy confronts Frank (right) on why he’s in Newport and Julie tells Kirsten of Frank’s true identity. When Frank comes to dinner at the Cohen house, Sandy channels some “kid-chino” in The My Two Dads episode of THE O.C Thursday, Jan. 4 (tonight) on FOX.

Click here to watch a clip on FOX's homepage.