Season 6: Episode 130: Nocturnal Omission
When Doug hears from Carrie that Deacon's ex-wife wants to reunite with him after a two-year separation, he can't decide whether or not to give Deacon the heads-up. When Deacon informs Doug that he just met a beautiful stewardess and is spending the entire weekend with her, Doug decides not to tell him about his ex-wife's plans to reunite with him. But when Carrie discovers this, she demands that Doug tell Deacon so he doesn't ruin his chances of getting back with Kelly.