"Belles of the Ball"

This episode is a standout in season four. Carrie and Aidan continue to tiptoe around the big issue in their relationship: Mr. Big. And then before you know it, she's invited him up to Aidan's cabin for the weekend. What happens is exactly what you'd expect from two immature men — an all-out mud fight. But the resulting forced camaraderie between the two men makes it all worth it, and Carrie yelling "Stop! You're middle-aged!" in the middle of the mud fight is what dreams are made of.