1O Ceifador Sinistro
O hamster de estimação de Billy, o Sr. Snuggles, comemora seu décimo aniversário, então o Ceifador vem buscá-lo. No entanto, Mandy, a amiga de Billy, reluta em permitir isso, então ela propõe um acordo ao Ceifador: se ele vencer as crianças em um jogo, poderá levar o hamster, mas se perder, poupará a vida do hamster e se tornará seu “melhor amigo para sempre”. O Ceifador Puro Osso transporta as crianças para o limbo, onde as desafia para um jogo de limbo. Apesar de seu esforço, Puro Osso acaba perdendo porque é atacado pelo Sr. Snuggles a mando de Mandy.
2Esqueletos no Banheiro
A mãe de Billy, Gladys, primeiro percebe Puro Osso na cama de Billy, depois no chuveiro e, em seguida, começa a ter surtos de pânico pensando que Billy está em perigo. Enquanto isso, Harold, o pai de Billy, acha que Gladys está imaginando coisas. No final, Gladys acaba indo morar com a tia de Billy, Sis, para tentar se acalmar. Expandir
3Dia do Contra
Billy e Mandy dizem a Puro Osso que é o “Dia do Contra” e que, quando eles dizem algo, na verdade querem dizer o oposto. Devido à sua dificuldade em entender o conceito de Dia do Contra, Puro Osso tem de fazer as tarefas de Mandy. Finalmente, Puro Osso acha que entende quando Billy e Mandy dizem que “querem” torta, o que significa que eles “não querem” torta. No entanto, Mandy diz que, quando ela disse que era o Dia do Contra, na verdade não era.
4Se Toca!
Puro Osso está cansado de ficar sozinho quando Billy e Mandy não estão com ele. Puro Osso decide realizar seu sonho trabalhando como modelo de maiô, mas, como ele é um cadáver, não é contratado. Em seguida, Billy e Mandy fazem uma maquiagem para que ele pareça mais humano. No final, Puro Osso consegue o emprego em um anúncio de TV, mas ele aparece no comercial por apenas alguns segundos e é retratado como uma pessoa feia.
5Mortal Dilemma
Grim misses his job and goes out on the town hoping to recapture some of the glory of his past. After rescuing a doomed skateboarder, Grim begins to question his purpose in the universe.
6Get Out of My Head!
Grim teaches Billy how to take control of someone else's body. Billy, unfortunately, makes the mistake of trying his new skill out on Mandy.
7Fiend Is Like Friend Without the 'R'
Billy and Mandy are kidnapped by another supernatural creature. Grim must decide if he'd rather rescue his "friends" or just relax in a lawn chair.
8Recipe for Disaster
After Billy eats all of the Person Scout cookies the kids are supposed to be selling, Grim saves the day with his Great Aunt's secret recipe. The whole town discovers that some recipes should be kept secret.
9A Dumb Wish
Billy and Mandy discover that Grim's mom is a genie. Mandy is soon in control of the only remaining wish, with Grim and Billy desperately trying to curry favor.
10Grim vs. Mom
Billy’s Mom returns, bent on taking vengeance on Grim!
11Tastes 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!
12Grim 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.
13Something Stupid This Way Comes
Nergal returns, trying to win friends with a giant carnival. Billy takes up his cause, revealing to Nergal the five C’s of friendship.
14A Grim Surprise
Billy and Grim plan a surprise birthday party for Mandy, only to succumb to a surprise of their own.
15Beasts and Barbarians
Billy and Irwin are addicted to the video game “Beasts & Barbarians.” Mandy and Grim work to cure Billy and Irwin of their addiction by venturing to another dimension to give Billy and Irwin a taste of “the real thing.”
16Hoss Delgado: Spectral Exterminator
Grim must evade extermination at the hands of Hoss Delgado, Spectral Exterminator!
17To Eris Human
Eris, the Goddess of Chaos, arrives at the Endsville mall. She takes Mandy under her wing while Grim pines over his unrequited love for Eris.
18Billy's Growth Spurt
Billy eats too much junk food and gets a small growth on his back. It grows and grows until it becomes an evil pint-sized Billy! Can Mandy and Grim get rid of the evil growth before it terrorizes the neighborhood?!
19Billy & the Bully
Billy runs afoul of Sperg, the school bully. With the help of Mandy and Grim, will Billy get Sperg to leave him alone?
20Big Trouble in Billy's Basement
Billy steals Grim’s “bad book” and accidentally brings about the beginning of an apocalypse. Hoss Delgado returns to lend a hand as Grim and Mandy try to stop Billy from bringing existence to an end!
21Tickle Me Mandy
Mandy goes away for the weekend. Billy is a wreck without Mandy. So Grim makes Billy a new Mandy out of old toys. But this new Mandy is not all she’s cracked up to be.
22Little Rock of Horrors
Billy befriends a giant brain eating meteor in his backyard.
23Dream a Little Dream
Grim, Billy and Mandy eat some bad pizza, resulting in a series of bizarre and mind bending dreams.