S3·E4 Remember When

When a hockey puck bonks Alden on the head, he suddenly thinks that he and Sharon are still a couple. Following doctor's orders to ""not shock his system"", Sharon and the rest of the gang go along with the deception until Alden 'comes to his senses'. But Marlo grows unhappy and impatient seeing her boyfriend cuddling up to Sharon - while Sharon is surprised to find that she's kind of enjoying the walk down memory lane.