"The Cad and the Hat" is the fifteenth episode of the twenty-eighth season of the American animated television series The Simpsons, and the 611th episode of the series overall. It aired in the United States on Fox on February 19, 2017. Plot Lisa, acting as narrator for the episode (alongside Bart), describes the ups and downs of being Bart's sister, before proceeding to a story about a time when the pair had a much bigger rift between them than usual. Her story begins when the Simpsons family decide to head off for a fun trip to the newly "safe" Springfield beachfront area; despite the dangerously polluted water being no better than before, Mayor Quimby reclassified the area after the safety standards were lowered. Whilst at the beach, Bart becomes angry over Lisa's good fortune, when she becomes ecstatically happy with a new sunhat she finds, while he becomes sad over the failure of his "Bad to the Bone" temporary tattoo, due to it being not waterproof. On their way home, Bart takes her hat while she sleeps in the car and tosses it out the window into a junkyard. When Lisa finds out that it is gone, she becomes inconsolable, leading Bart to receive the first of an increasingly grotesque and uncomfortable visits from his "guilt monster" – a slime-covered creature who sounds like Patton Oswalt and reminds him of what he did, and which grows and becomes progressively hideous the more Bart denies his guilt. After enough visits, Bart finally accepts his guilt and tells Lisa the truth, only to find that she feels wounded by his actions and thus refuses his desperate attempts to make amends with her. Believing the only way to be forgiven is to recover the hat, Bart returns to the junkyard and discovers the hat to have become a part of a car that had been crushed into a cube, and so using Rod and Todd Flanders' Jesus-like powers and the acidity of Buzz Cola, he breaks the hat free from the car. However, upon presenting the hat back to Lisa, she informs him that he misinterpreted her words, stating that their relationship was over because of his actions and that he should now focus on being a brother to Maggie. Just then, Lisa finds herself having a vision in which she meets her own emotional spirit, who angrily tells her that her brother