Season 4: Episode 84: Veiled Threat
While cleaning out the Heffernan freezer, Carrie comes across the top tier of her and Doug's wedding cake, and reflects back to the time when they got married. As she takes a trip down memory lane, Carrie remembers her uneasiness prior to their wedding day and her desperation in needing a sign from God to be sure about the marriage. The priest calms Carrie's insecurity by informing her that she and Doug actually met years before when they were kids. Carrie feels that that's a "sign" from above, but Doug later learns that it was Danny, his cousin, whom she met, not him, and is afraid to tell her the truth. Also, Arthur convinces Doug's parents to cover the cost of the wedding, and then proceeds to spend all their money to make the day extra special.