The Grim Adventures Of Billy and Mandy Season 6 Episode 3 - The Love That Dare Not Speak Its Name / Major Cheese >Billy, Mandy, and Grim visit Mighty Moe, an old man who has discovered the secret to add extra years to his lifespan: a good diet and exercise. Mighty Moe decides to publish his secret in a book, and Grim needs to stop him by offering junk food.