You will Watch The Grim Adventures Of Billy and Mandy Season 6 Episode 8 online for free episodes with HQ / high quality. Stream cartoons The Grim Adventures Of Billy and Mandy Episode 68 Billy and Mandy vs. the Martians When Billy destroys Grim’s favorite childhood toy, Fancy Jake, Grim feels devastated and wishes he had never lost the limbo game that made him become Billy and Mandy’s friend. Then, a lawyer appears saying that although the game is legally binding while all parties remain on Earth, it is not if Grim leaves Earth. In consequence, Grim follows the lawyer’s advice, opens a portal, and leaves. Then, with Grim travelling aboard his spaceship, the lawyer takes off his disguise and introduces himself as Morg, the Martian Grim Reaper, who is also Emperor of Mars and commands an army of martian, brain-eating zombies.