Adventure Time (2010)

S3E18 The New Frontier

Jake has a vivid nightmare about his own demise, prompting Finn to spring into action as the unsettling events from the dream begin to unfold in reality. With time running out, Finn races to decipher the meaning behind Jake's dream and prevent his brother's fate from becoming a reality. As they navigate this surreal challenge, their bond is tested, and they must confront their deepest fears together.