Episode Title:
Don't Look.
Episode Description:
Finn unearths a treasure at the top of Dead Mountain—magical glasses. But these glasses come at a terrible price, for they turn those gazed upon into that which the wearer perceives them to be. Finn's gaze soon literally transforms Jake into a cooler older brother, BMO into a winged angel, Bubblegum into a "teenage boy heart-throb," the Ice King into Simon, and NEPTR into a microwave. Upon realizing that he turned NEPTR into an inanimate object, Finn breaks down and looks at himself in the mirror, which causes him to turn into an actual monster. Jake, however, is able to console his brother by telling him that, while Finn's eyes are bad at describing reality, his heart knows what is right. This breaks the spell and returns everything to normal.
