You will Watch Adventure Time Season 5 Episode 39 online for free episodes with HQ / high quality. Stream cartoons Adventure Time Episode 143 Finn, Jake and BMO decide to fix up a truck with the help of Banana Man (voiced by “Weird Al” Yankovic). BMO later stays up all night fixing it, only to hear a radio program claiming that Princess Bubblegum is a mutant reptile. Later on, the four take the newly fixed truck into the Candy Kingdom and learn that Bubblegum was actually replaced by a mutant. With the help of the truck, they save the real Bubblegum and destroy the creature.