Grim or Gregory? / Grim vs. Mom / Tastes Like Chicken

S1 E4: "Grim or Gregory?" While on a Halloween excursion, Grim finds himself mistaken for a young boy named Gregory. Now it's up to Billy and Mandy to return Gregory to his mom and retrieve their wayward Grim. "Grim vs. Mom" Billy's Mom returns, bent on taking vengeance on Grim! "Tastes Like Chicken" After some shoddy detective work, Billy and Grim deduce that Mandy is a cannibal and has eaten everyone in the neighborhood! Billy decides to confront Mandy before she eats him!