"Spider's Little Daddy" Mandy convinces Jeff that the only way he can get attention from his father Billy is to be meaner. But Billy still only sees in Jeff a big hairy spider. "Tricycle Of Terror" Billy wants a bicycle badly, so after entering a strange portable toilet, he is given a tricycle that he is told he must love forever. The tricycle is haunted and seeks revenge against anyone that harms Billy.
"Dumb Luck" Billy endures a string of bad luck after failing to throw salt over his shoulder at Grim's urging. Grim realizes that a catastrophe snail has entered Billy's head to create havoc.
"Lil' Porkchop" Mandy and Grim buy Billy a fish, only Billy chooses a sick fish with respiration problems. Grim feels bad for the fish, Lil' Porkchop, and makes him grow large. "Skarred For Life" General Skarr recalls how he became a pained monster after moving into the house next to Billy and Mandy.
"House Of Pain" Lord Pain, from the Plane of Eternal Suffering, shows up claiming allegiance to Grim. Grim tells Lord Pain that he is tired of doing Billy and Mandy's bidding, so Lord Pain tries to rid Grim of the children.
"Nursery Crimes" Grim puts Billy and Mandy inside a supernatural storybook, where Pinocchio befriends Billy so he can eat his flesh and become a real boy.
"Nigel Planter And The Chamber Pot Of Secrets" Nigel Planter from Weaslethorp House recounts how he is being chased by the wizard Lord Moldybutt. So Mandy sets out to stop the evil wizard and finds out that it is really Professor Toadblatt in disguise. "Circus Of Fear" Grim takes a bored Mandy and Billy to the Underworld's Circus of Fear. After the show, the circus owner tries to buy and then the children to use in his show.
"Bully Boogie" The Boogie Man stops by to say hello to Grim, who he used to bully at school. When the Boogie Man leaves, he takes Billy with him. So Grim follows with Mandy to get Billy and revenge. "Here There Be Dwarves!" While on a picnic by himself, Billy is chased by Yogi Bear into a cave. In the cave, Billy meets a bunch of angry dwarves who wish to battle against the elves and their cookie factory.
"Which Came First?" A field trip to the museum goes unexpectedly when the school bus gets a flat tire in the desert. While exploring, Billy is taken for chicken feed by an overly large chicken.