'Good Morning, Mrs. Butterworth' - Season 6, Episode 23
Alan and Chelsea become best buds, and Charlie decides to take advantage of the situation.
Air Date: May 11th 2009.
Charlie: You know how they say you can be alone but not lonely?
Charlie: Well, Alan's kind of the opposite. He is always lonely, but he's never alone.
Charlie: You know, Berta, I thought when Alan moved in here I was being punished.
Berta: You and me both.
Jake: Why is Dad's dummy here?
Charlie: He pissed off his mother.