During a party at his parents' beach house, Nathan shows this old video of Dan and Karen at a high school dance. He calls it "a comedy."
Lucas almost cries.
Peyton is disgusted.
Lucas appears stunned. It's like a car wreck. He can't look away.
Even Brooke is shocked.
Ha ha! What a jolly joke!
Unfortunately for Nathan, Peyton has seen enough. She's pissed and, later in the episode, she dumps him.
"What the fuck? You're breaking up with me?"
"Yes! You are a colossal jackass!"
That's right, Nathan. Let it sink in.
It remains to be seen whether a greater influence from his mother, who returned to Tree Hill in this episode and vowed to spend more time with her son, may help turn Nathan around. She's not Dan, so that should help.