In the second part of the two hour season finale, Lucas and Brooke make a sizzling connection after he finally admits his true feelings for her. Nathan and Deb conspire to desert Dan for good, leading to an explosive conclusion when he discovers their plan. Meanwhile, a long-buried family secret is destined to rock Peyton’s world. And at the climax of Dan’s numerous deceptions someone sets the dealership on fire… with him in it.