• E3
• 0 hrs 22 min
• 14th December 2001

Billy wanders into a junkyard, where a massive hole in the earth opens up and pulls him down in. Later, Mandy and Grim get pulled in as well. They land at the center of the Earth, which is home of Nergal, a devilish creature. The lonely Nergal, who has been watching Billy and Mandy for some time, wants Grim to hand over the kids to him so they can be his friends forever. Grim happily leaves the kids behind as he returns to the surface; however, he later goes back for them because he can't handle the guilt of abandoning his friends. In the end, Grim is defeated by Nergal's electrified tentacles, but Mandy defeats Nergal merely by kicking him in the shin.   Billy, Mandy, Grim, and Pud'n are part of the "Person Scouts" (a Boy Scouts-esque organization) and need to sell cookies in order to win a badge. However, as Billy eats all of the cookies, Grim proposes to bake their own cookies using his aunt Kali's secret recipe. The cookies are a success and the troupe wins the contest. In the end, at the Person Scouts awards ceremony, aunt Kali reveals that the secret recipe contains insects, but everyone continues eating the cookies anyway.   While Spring cleaning in the middle of November, Billy finds an old lamp in Grim's trunk. Despite Grim's warning about it being cursed, Billy shines the lamp anyway, releasing Grim's mother from inside. She tells Billy that she will grant him three wishes. Billy's first wish is used up when he wishes to know what to wish for. After Billy and Grim argue about who gets to make the next wish, Mandy wishes they both would "shut up", and their lips are sealed with a zipper. Mandy decides to grant the last wish to whoever makes her the happiest. When the two fail to make her happy, Mandy wishes everyone in the world would go away, leaving Mandy the only person left on Earth.

• E4
• 0 hrs 22 min
• 26th July 2002

On Halloween, Billy, Mandy, and Grim go trick-or-treating. Grim mistakes a woman for Atrocia, the host of the all-night Halloween marathon on TV and goes to talk to her. Upon looking at her face, Grim realizes his mistake; however, the woman mistakes Grim for her son, Gregory, and takes him home. At the same time, Billy mistakes Gregory for Grim and he and Mandy take him with them. In the end, Billy and Mandy take Gregory back to his mother and Grim goes back with them.   After having a nervous breakdown and leaving the house in the first episode, Billy's mother, Gladys, returns. She meets Grim again and, this time, she plans to destroy him once and for all. When Grim goes to the kitchen for a glass of water, Gladys attacks him and shatters his skeleton. In the end, Grim assures the kids that Gladys has won the battle but not the war.   With Irwin not answering the phone, Billy's parents missing and Mandy saying she wants "Billy for dinner", Billy and Grim assume Mandy is a cannibal who ate Billy's parents and friends. Looking for proof, Billy and Grim find tiki figures and arrangements for a celebration in Mandy's backyard. Ultimately, it is revealed that they are just celebrating Billy's birthday. Still, Mandy burps out Irwin's glasses, implying that Mandy ate Irwin, causing Billy to scream in terror.

• E5
• 0 hrs 22 min
• 26th July 2002

Nergal, the fiend from the center of the Earth, returns to the surface, bringing a carnival with him, trying once more to make friends with the surface dwellers. Billy tries to help Nergal make friends by being considerate, but Nergal fails to use his advice correctly. When Nergal is told that Grim was forced to be Billy and Mandy's friend-slave, Nergal then decides to force the world to be his friends by turning them into dark beings similar to him. In the end, Nergal turns Billy, Mandy, Grim, and even the viewer (thus breaking the fourth wall) into one before the episode ends.   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 is not for five months, something that Billy already knew about, stating that makes it "a real surprise party."   Billy and Irwin have been playing their favorite video game, Beasts and Barbarians, for three days non-stop. In an attempt to stop their video game addiction, Grim transports them all to a real-life version of the game. Seeing as Billy and Irwin are still doing good in their quest, Grim increases the difficulty by manipulating the traps himself. In the end, Billy, Mandy, and Grim return home escaping from a giant cyclops, while Irwin remains trapped.

• E6
• 0 hrs 22 min
• 4th October 2002

Billy eats too much junk food that makes him feel sick. Grim prepares him a remedy using his granny's recipe, but it causes a parasite to growing on Billy's back, which Billy names Yap-yap. Billy and Yap-yap continue eating junk food, so Mandy suggest to use the antidote to the original remedy. Eventually, Yap-yap, now looking like a smaller version of Billy, detaches himself from Billy and tries to escape from the antidote. In the end, Yap-yap drinks the antidote and is destroyed.   Billy, Mandy, and Grim go to the museum on a school trip. There, they meet Hoss Delgado, self-appointed hunter of the paranormal, who upon spotting Grim, tries to eliminate him. Subsequently, Grim and Delgado engage in a fight. Finally, Delgado quits hunting Grim when he realizes Billy and Mandy control him. In the end, Delgado continues his own adventures and is seen fighting a werewolf.   Mandy and her parents leave the city for a day, which makes Billy feel lonely. Then, Grim uses his supernatural powers to create a fake Mandy with pieces of dolls and toys for Billy to play with. However, the "new" Mandy is too aggressive with Billy, and he starts fearing her. The next day, the real Mandy returns home, and promptly destroys the new Mandy while on a see-saw.

• E7
• 0 hrs 22 min
• 4th October 2002

Billy is constantly provoked by a bully named Sperg and runs over to Grim for help.   While going to the shopping mall with Billy and Mandy, Grim spots the seductive Eris, the cunning Goddess of Chaos and Discord, and tries to ask her out. However, Eris is not interested in the skinless Grim, but in the muscular Adonis. Then, Eris invites Mandy to join her in creating chaos using the Apple of Discord. Although initially they get along, Eris pulls a prank on Mandy, who subsequently tries to get revenge. In the end, Mandy fools Eris into thinking that Adonis is in the movie theater and Eris accidentally kisses Grim, who says that he will never wash his left cheek again.   After taking the Underworld's "Bad Book" from Grim, Billy becomes possessed by an evil presence. Then, Billy steals Grim's scythe, and uses it to open a portal to summon Yog-Sothoth. In consequence, Mandy calls for Hoss Delgado to battle Billy. It is revealed that the portal can only be sealed by throwing the book into it. As Billy eats the book, Mandy throws Billy himself into the portal, restoring everything to normal. Seconds later, a portal opens up and Billy comes out and says they didn't want him there.