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The Best Episodes of The Grim Adventures of Billy and Mandy Season 1

Every episode of The Grim Adventures of Billy and Mandy Season 1 ranked from best to worst. Discover the Best Episodes of The Grim Adventures of Billy and Mandy Season 1!

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The exploits of the Grim Reaper, who has been forced into being the best friend of two children. A spin-off of the show Grim & Evil.

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Episode Rankings

  1. #1 Fan Favorite
    The Grim Adventures of Billy and Mandy Season 1 Episode 1 - Meet the Reaper
    8.0/10(148 votes)

    #1 - Meet the Reaper

    S1:E1

    Billy's pet hamster, Mr. Snuggles, celebrates his 10th birthday, so the Grim Reaper comes for him. However, Mandy, Billy's friend, is reluctant in allowing it, so she proposes a deal to the Grim Reaper: if he beats the kids in a game, he can take the hamster, but if he loses, he will spare the hamster's life and become their "best friend forever". The Grim Reaper transports the kids to limbo, where he challenges them to a game of limbo. Despite his best effort, Grim ends up losing because he is attacked by Mr. Snuggles at Mandy’s command.

    Director:Maxwell Atoms
    Writer:Maxwell Atoms

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  2. The Grim Adventures of Billy and Mandy Season 1 Episode 2 - Skeletons in the Water Closet
    8.1/10(120 votes)

    #2 - Skeletons in the Water Closet

    S1:E2

    Billy's mother, Gladys, first notices Grim in Billy's bed, then in the shower and subsequently starts to get panic surges thinking that Billy is in danger. Meanwhile, Harold, Billy's dad, just thinks that Gladys is imagining things. In the end, Gladys ends up going living with Billy's aunt, Sis to try and calm herself down.

    Director:Dave Brain
    Writer:Greg Miller

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  3. The Grim Adventures of Billy and Mandy Season 1 Episode 3 - Opposite Day
    7.5/10(109 votes)

    #3 - Opposite Day

    S1:E3

    Billy and Mandy tell Grim it is "Opposite Day" and that, when they say something, they really mean the opposite. Due to his difficulty understanding the concept of Opposite Day, Grim has to do Mandy's chores. Finally, Grim thinks he understands when Billy and Mandy say they "want" pie, meaning they "do not want" pie. However, Mandy then says that when she said it was Opposite Day, it really was not.

    Director:Dave Brain
    Writer:Maxwell Atoms

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  4. The Grim Adventures of Billy and Mandy Season 1 Episode 4 - Look Alive!
    8.2/10(121 votes)

    #4 - Look Alive!

    S1:E4

    Grim is bored of being left alone while Billy and Mandy are not with him. Grim decides to fulfill his dream by working as a swimsuit model, but, as he is a corpse, he is not hired. Subsequently, Billy and Mandy give him a makeover to look more human. In the end, Grim gets the job in a TV ad, but he is only in the commercial for a few seconds and is portrayed as an ugly person.

    Director:Brian Hogan
    Writer:Maxwell Atoms

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  5. The Grim Adventures of Billy and Mandy Season 1 Episode 5 - Mortal Dilemma
    7.7/10(100 votes)

    #5 - Mortal Dilemma

    S1:E5

    Grim misses his life as the reaper of souls and, due to his bet, he cannot return to the Underworld, much to the hilarity of his Underworld co-workers. Having a sudden epiphany, Grim decides to be good and help people rather than try to take their souls. However, Grim's attempts at being good are faced with resistance from people, who are scared off by his appearance.

    Director:Brian Hogan
    Writer:Amy Keating Rogers

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  6. The Grim Adventures of Billy and Mandy Season 1 Episode 6 - Get Out of My Head!
    7.5/10(99 votes)

    #6 - Get Out of My Head!

    S1:E6

    After watching a movie, Grim teaches Billy to possess people by jumping into their heads. Billy possesses Mandy and makes her do assorted things like flirting with Irwin, kissing Mandy's mother, going into both men's and women's restrooms and eating earthworms. In the end, Billy leaves Mandy's head, but later that night, Mandy possesses Billy's cat, Milkshakes, to maul him as a form of revenge.

    Director:Dave Brain
    Writer:Maxwell Atoms

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  7. The Grim Adventures of Billy and Mandy Season 1 Episode 7 - Fiend Is Like Friend Without the 'R'
    8.0/10(98 votes)

    #7 - Fiend Is Like Friend Without the 'R'

    S1:E7

    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.

    Director:Brian Hogan
    Writer:Craig Lewis

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  8. The Grim Adventures of Billy and Mandy Season 1 Episode 8 - Recipe for Disaster
    8.2/10(89 votes)

    #8 - Recipe for Disaster

    S1:E8

    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.

    Director:Dave Brain
    Writer:Maxwell Atoms

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  9. The Grim Adventures of Billy and Mandy Season 1 Episode 9 - A Dumb Wish
    7.9/10(84 votes)

    #9 - A Dumb Wish

    S1:E9

    While Spring cleaning in the middle of November, Billy takes an old, cursed lamp from Grim's trunk. When he gives it a rub, he releases the curse Grim had warned them about: his own mother. Having three wishes to make, Billy wastes his wish by wishing to know what to wish for. Mandy wishes Billy and Grim would "shut up", so Grim never gets to make his wish. Then, Mandy decides to make the last wish to whoever makes her the happiest. In the end, Mandy wishes everyone in the world would go away, which she is glad about.

    Director:Brian Hogan
    Writer:Paul McEvoy

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  10. The Grim Adventures of Billy and Mandy Season 1 Episode 10 - Grim vs. Mom
    0.0/10(0 votes)

    #10 - Grim vs. Mom

    S1:E10

    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.

    Director:Brian Hogan
    Writer:Gord Zajac

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  11. The Grim Adventures of Billy and Mandy Season 1 Episode 11 - Tastes Like Chicken
    0.0/10(0 votes)

    #11 - Tastes Like Chicken

    S1:E11

    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.

    Directors:Brian Hogan, John McIntyre
    Writer:Gord Zajac

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  12. The Grim Adventures of Billy and Mandy Season 1 Episode 12 - Grim or Gregory?
    7.0/10(1 votes)

    #12 - Grim or Gregory?

    S1:E12

    It's 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 Gregory is now Grim, and does not have a stomach. 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.

    Director:Brian Hogan
    Writer:Gord Zajac

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  13. The Grim Adventures of Billy and Mandy Season 1 Episode 13 - Something Stupid This Way Comes
    7.0/10(1 votes)

    #13 - Something Stupid This Way Comes

    S1:E13

    Nergal, the fiend from the center of the Earth, returns to the surface, emerging a carnival with him, trying once more to make friends. In the following, Billy tries to help Nergal make friends by being considerate, but Nergal fails to apply correctly his advice. 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.

    Directors:Robert Alvarez, John McIntyre
    Writer:Craig Lewis

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  14. The Grim Adventures of Billy and Mandy Season 1 Episode 14 - A Grim Surprise
    7.9/10(64 votes)

    #14 - A Grim Surprise

    S1:E14

    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.

    Directors:Robert Alvarez, John McIntyre
    Writer:Rob Desales

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  15. The Grim Adventures of Billy and Mandy Season 1 Episode 15 - Beasts and Barbarians
    8.4/10(172 votes)

    #15 - Beasts and Barbarians

    S1:E15

    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.

    Director:Dave Brain
    Writer:Gord Zajac

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  16. The Grim Adventures of Billy and Mandy Season 1 Episode 16 - Hoss Delgado: Spectral Exterminator
    0.0/10(0 votes)

    #16 - Hoss Delgado: Spectral Exterminator

    S1:E16

    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.

    Director:Brian Hogan
    Writer:Gord Zajac

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  17. The Grim Adventures of Billy and Mandy Season 1 Episode 17 - To Eris Human
    0.0/10(0 votes)

    #17 - To Eris Human

    S1:E17

    While going to the shopping mall with Billy and Mandy, Grim spots the beautiful Eris, the goddess of discord and chaos, 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.

    Director:Dave Brain
    Writer:Gord Zajac

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  18. The Grim Adventures of Billy and Mandy Season 1 Episode 18 - Billy's Growth Spurt
    7.0/10(1 votes)

    #18 - Billy's Growth Spurt

    S1:E18

    Billy eats too much junk food that makes him feel sick. Grim prepares him a remedy using his granny's recipe, but this medicine makes a parasite to start growing in Billy's back, which Billy names Yap-yap. In the following, 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 (which would have technically cured Billy without the need of him drinking the anitdote), and tries to escape from the antidote. In the end, Yap-yap drinks the antidote and is destroyed.

    Director:Brian Hogan
    Writer:Gord Zajac

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  19. The Grim Adventures of Billy and Mandy Season 1 Episode 19 - Billy & the Bully
    7.0/10(1 votes)

    #19 - Billy & the Bully

    S1:E19

    Billy is constantly provoked by a bully named Sperg and runs over to Grim for help.

    Directors:Robert Alvarez, John McIntyre
    Writer:Gord Zajac

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  20. The Grim Adventures of Billy and Mandy Season 1 Episode 20 - Big Trouble in Billy's Basement
    0.0/10(0 votes)

    #20 - Big Trouble in Billy's Basement

    S1:E20

    After taking the Underworld's "Bad Book" from Grim, Billy becomes possessed by an evil entity. 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. Instants later, a portal opens up and Billy comes out and says they didn't want him there.

    Directors:Robert Alvarez, John McIntyre
    Writer:Gord Zajac

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  21. The Grim Adventures of Billy and Mandy Season 1 Episode 21 - Tickle Me Mandy
    0.0/10(0 votes)

    #21 - Tickle Me Mandy

    S1:E21

    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 in the see-saw.

    Director:Brian Hogan
    Writer:Gord Zajac

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  22. The Grim Adventures of Billy and Mandy Season 1 Episode 22 - Little Rock of Horrors
    0.0/10(0 votes)

    #22 - Little Rock of Horrors

    S1:E22

    In this musical episode, which pays homage to Little Shop of Horrors, Billy befriends a singing brain-eating meteor (voiced by Voltaire) that falls from the sky. With Billy's help, the creature grows bigger and eventually eats the brains of all people in Endsville (turning them into zombies with glowing green eyes). The last brain he eats is Mandy's, which results in the creature transforming into a brain-eating Mandy. The song featured is BRAINS!, composed by goth artist Voltaire specifically for this episode.

    Director:Robert Alvarez
    Writer:Gord Zajac

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  23. The Grim Adventures of Billy and Mandy Season 1 Episode 23 - Dream a Little Dream
    0.0/10(0 votes)

    #23 - Dream a Little Dream

    S1:E23

    Billy, Mandy, and Grim eat moldy pizza leftovers, and after falling asleep, they have nightmares. Billy dreams of cute bunnies which turn into monsters; Grim dreams of an endless number of bossy Mandys; Mandy dreams of being pulled into a volcano and then commanding demons at the rhythm of music, in a scene that reminisces the Night on Bald Mountain segment of Fantasia. In the end, Mandy reveals that her dream was actually very pleasant, and she eats the last slice of the rotten pizza.

    Director:Dave Brain
    Writer:Gord Zajac

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Season 1 Ratings Summary

"Meet the Reaper" is the best rated episode of "The Grim Adventures of Billy and Mandy" season 1. It scored 8/10 based on 148 votes. Directed by Maxwell Atoms and written by Maxwell Atoms, it aired on 8/24/2001. This episode is rated 0.1 points higher than the second-best, "Skeletons in the Water Closet".