Billy tells Grim to help him throw a surprise birthday party for Mandy. Then, a reluctant Grim helps Billy prepare a cake while keeping it a secret from Mandy. In the end, a somewhat surprised Mandy reveals that her birthday isn't for the next five months, something that Billy already knew about.
Please solve the math problem below to unlock download mirrors for The Grim Adventures of Billy and Mandy.
Links are proxied and may take a moment to start.