The Price of Healthy Gums Is Eternal Vigilance

S2 E6: When Evelyn tells Jake that Alan shoplifted a toy as a child, Alan denies the charge, as he has ever since the incident took place. He finally admits to Charlie his theory that maybe there is a "Bad Alan"--an evil side of him that stole the toy--which the good side of him works daily to suppress. Charlie feels guilty and admits to planting the toy on him, destroying the brothers' relationship--until Evelyn offers to get involved.