You will Watch The Grim Adventures Of Billy and Mandy Season 5 Episode 5 online for free episodes with HQ / high quality. Stream cartoons The Grim Adventures Of Billy and Mandy Episode 57 Ecto Cooler: As Billy desires to be “cool” like Sperg, he has an ectoplasmic manifestation coming out of his mouth. Later, the ectoplasm grows full size and turns out to be the ghost of nineteenth-century British poet Lord Byron, who tries to teach Billy to be cool, using elaborate poetry instead of bare muscles. Subsequently, Billy uses a poem to insult Sperg’s mother, and Sperg challenges Billy to a duel. Then, Billy and Lord Byron fight Sperg and his gang, but are badly beaten. In the end, Byron tells Billy he has been trained in the arts of coolness, and disappears.