Whilst at the beach, Bart becomes angry over Lisa's good fortune when she becomes happy with a new sunhat she finds, while he becomes sad over the failure of his "Bad to the Bone" temporary tattoo because it is not waterproof.
After enough visits, Bart accepts his guilt and tells Lisa the truth, but she feels wounded by his actions and refuses his attempts to make amends with her.
Meanwhile, after being forced by Marge to do something other than leer at women beach volleyball players, Homer plays chess and finds he is of grandmaster strength, much to the shock of himself and everyone else.
Executive producer Al Jean said he would make Homer play a chess match with Grampa to test a theory.
Oswalt previously appeared as a different character in the twenty-fourth season episode "The Day the Earth Stood Cool.
"[6] "The Cad and the Hat" scored a 1.1 rating and was watched by 2.44 million people, making it Fox's highest-rated show of the night.
As it is, the episode is dispiriting in how disposably it treats its world, while reaching for a pair of emotional epiphanies that fall flat in the execution.