It’s obvious from the picture above that I’m talking about the episode where Sam and Carla kiss. It’s season 2, episode 13, “Battle of the Exes.” Carla’s ex-husband Nick (Dan Hedaya) and father of most of her children is getting married to a woman named Loretta (Jean Kasem). Carla has been invited to their wedding but she doesn’t have a date. Sam goes with her as her fake boyfriend, giving Carla the confidence to push Nick away when he says he wants her back.
However, after the wedding, Carla gets upset, realizing that, while her side of things was fake, Nick actually had someone real. As Sam comforts her, they have a moment and end up kissing. They decide that they’re better off as friends, though this happens as Diane is coming over to the bar with her luggage for a vacation with Sam. Of course, Sam doesn’t tell her what just happened. They make jokes with each other and head off for vacation like he didn’t just lock lips with someone else. Shelley Long was upset for her character and took it very personally.