Seasons & Episodes
Meet the Reaper
Billy's pet hamster, Mr. Snuggles, celebrates his 10th birthday, so the Grim Reaper comes for him. However, Mandy, Billy
Skeletons in the Water Closet
Billy's mother, Gladys, first notices Grim in Billy's bed, then in the shower and subsequently starts to get panic surge
Opposite Day
Billy and Mandy tell Grim it is "Opposite Day" and that, when they say something, they really mean the opposite. Due to
Look Alive!
Grim is bored of being left alone while Billy and Mandy are not with him. Grim decides to fulfill his dream by working a
Mortal Dilemma
Grim misses his life as the reaper of souls and, due to his bet, he cannot return to the Underworld, much to the hilarit
Get Out of My Head!
After watching a movie, Grim teaches Billy to possess people by jumping into their heads. Billy possesses Mandy and make
Fiend Is Like Friend Without the 'R'
Billy wanders into a junkyard, where a massive hole in the earth opens up and pulls him down in. Later, Mandy and Grim g
Recipe for Disaster
Billy, Mandy, Grim and Pud'n are part of the "Person Scouts" (a Boy Scouts-esque organization) and need to sell cookies
A Dumb Wish
While Spring cleaning in the middle of November, Billy takes an old, cursed lamp from Grim's trunk. When he gives it a r
Grim vs. Mom
After having a nervous breakdown and leaving the house in the first episode, Billy's mother, Gladys, returns. She meets
Tastes Like Chicken
With Irwin not answering the phone, Billy's parents missing and Mandy saying she wants "Billy for dinner", Billy and Gri
Grim or Gregory?
It's Halloween, Billy, Mandy and Grim go trick-or-treating. Grim mistakes a woman for Atrocia, the host of the all-night
Something Stupid This Way Comes
Nergal, the fiend from the center of the Earth, returns to the surface, emerging a carnival with him, trying once more t
A Grim Surprise
Billy tells Grim to help him throw a surprise birthday party for Mandy. Then, a reluctant Grim helps Billy prepare a cak
Beasts and Barbarians
Billy and Irwin have been playing their favorite video game, Beasts and Barbarians, for three days non-stop. In an attem
Hoss Delgado: Spectral Exterminator
Billy, Mandy, and Grim go to the museum on a school trip. There, they meet Hoss Delgado, self-appointed hunter of the pa
To Eris Human
While going to the shopping mall with Billy and Mandy, Grim spots the beautiful Eris, the goddess of discord and chaos,
Billy's Growth Spurt
Billy eats too much junk food that makes him feel sick. Grim prepares him a remedy using his granny's recipe, but this m
Billy & the Bully
Billy is constantly provoked by a bully named Sperg and runs over to Grim for help.
Big Trouble in Billy's Basement
After taking the Underworld's "Bad Book" from Grim, Billy becomes possessed by an evil entity. Then, Billy steals Grim's
Tickle Me Mandy
Mandy and her parents leave the city for a day, which makes Billy feel lonely. Then, Grim uses his supernatural powers t
Little Rock of Horrors
In this musical episode, which pays homage to Little Shop of Horrors, Billy befriends a singing brain-eating meteor (voi
Dream a Little Dream
Billy, Mandy, and Grim eat moldy pizza leftovers, and after falling asleep, they have nightmares. Billy dreams of cute b
Toadblatt's School of Sorcery
Grim gets Billy and Mandy into sorcery school.
Educating Grim
Mindy befriends Grim.
It's Hokey Mon!
Grim brings monster cards to life.
Night of the Living Grim
Grim gets sick.
Brown Evil
Zombies crave the brownies Billy makes.
Brown Evil, Part 2
Zombies crave the brownies Billy makes.
Mandy the Merciless
In the future, Mandy rules the world.
Creating Chaos
Billy helps Eris spread chaos.
The Really Odd Couple
Mandy and Billy are forced to share a room.
Who Killed Who?
Mandy visits a haunted house.
Tween Wolf
Irwin turns into a werewolf.
Grim in Love
Grim falls for a Goth girl.
Crushed!
Mandy develops a crush.
Love Is Evol Spelled Backwards
Nergal attempts to woo Billy's aunt.
The Crawling Niceness
Billy hatches a giant spider.
Smarten Up!
Grim tries to help Billy pass a test.
The Grim Show
Grim tries to stop a show from being canceled.
Son of Nergal
Billy and Mandy contend with Nergal Jr.
Sister Grim
Grim thinks he is a nun.
Go Kart 3000!
Grim and the children enter a kart competition.
Terror of the Black Knight
Billy tries to show off at the Renaissance festival.
Battle of the Bands
Grim sings in a band.
The Halls of Time
Billy and Mandy visit the Halls of Time.
Grim for a Day
Billy and Grim switch places for a day.
Chicken Ball Z
Mandy eats a magical ball of chicken.
Billy and Mandy's Jacked Up Halloween
A headless man from Grim's past uses Billy to steal Grim's scythe.
Spider's Little Daddy
At a father-and-son picnic, Billy re-encounters with his spider "son", Jeff, in a dirty bathroom. Once again, Jeff tries
Tricycle of Terror
When Billy crashes his bicycle, he obtains a free tricycle from a mysterious boy in a supernatural porta-potty. While Bi
Dumb Luck
After spilling salt in a restaurant, and not throwing salt over his left shoulder, Billy starts having an unusual amount
No Body Loves Grim
Billy, Mandy and Grim go to the beach where Grim falls asleep and Billy buries him in sand. When they leave, Billy only
Lil' Porkchop
After he turns down his dad's invitation to go fishing, Billy gets a tiny, weakling, pet fish, which he names Little Por
Skarred for Life
General Skarr buys a home in Endsville and becomes Billy's neighbor. After Skarr invites Billy into his new house, Billy
House of Pain
Lord Pain, a fearsome warrior from the Plain of Eternal Suffering, appears in Billy's house looking to serve his master,
A Grim Prophecy
In this short, set in the Stone Age, a child version of Grim undertakes his first assignments as the Grim Reaper. When h
Mandy Bites Dog
When Mindy mocks Mandy's dumb and coward dog, Saliva, Mandy decides to train her dog to be meaner. After Grim keeps ment
Nursery Crimes
After Billy eats 19 creme-filled Atomic Frenzy Cakes he cannot sleep and wants Mandy to read him a bedtime story. Mandy,
My Peeps
When Billy ruins his eyes by playing too many video games and looking directly into the Sun, Mandy and Grim suggest he s
Nigel Planter and the Chamber Pot of Secrets
When Billy, Mandy and Grim go playing golf, they encounter boy wizard Nigel Planter again, who is there hiding from the
Circus of Fear
When Billy and Mandy are utterly bored, Grim takes them to Underworld's "Circus of Fear". The ringleader, Dr. Fear, noti
Bully Boogie
After failing to scare a fifteen-year-old, the Boogeyman decides to visit his old middle-school victim, Grim. Grim remem
Here Thar Be Dwarves!
As Billy walks into the woods to have a picnic, Yogi and a giant, feral version of Boo-Boo (from The Yogi Bear Show) com
Which Came First?
While going to a science museum, Billy and Mandy's school bus breaks down in the middle of the desert. After digging for
Substitute Teacher
Billy's first cousin from the center of the Earth, Nergal Jr. goes to school for the first time, but he is worried that
Super Zero
After watching a TV show, starring Captain Heifer and his Heifer Farms Brand Yogurt, Billy asks Grim to turn him into a
Sickly Sweet
Trying to get revenge at Mandy for bossing them all the time, Billy and Grim put her in the "Mask of the Beast". Mandy m
Bearded Billy
When Billy sees his father shaving, he decides having a beard is cool and buys "Hair Raiser Tonique", a hair-growing for
The Nerve
After being bullied again by Sperg, Billy asks Grim to shrink him to enter Mandy's head to steal her "nerve". After Bill
Test of Time
When Billy forgets to do his history homework, Grim gives him a universal remote control to alter time and space so he c
A Kick in the Asgard
During a thunderstorm, a lightning bolt hits Grim's scythe, transporting Billy to Asgard, land of the Norse gods. Mandy
Five O'Clock Shadows
Grim is annoyed by Billy who thinks that a shadow is following him. Grim takes Billy and Mandy to the Shadows' World, wh
Attack of the Clowns
After Billy wakes up from another nightmare involving clowns, he is more terrified than ever towards them, so Mandy and
Complete and Utter Chaos
Thinking that the world is chaotic enough as it is, Eris, the goddess of chaos, decides to quit chaos to work at a hambu
Whatever Happened to Billy Whatishisname?
When Billy and Mandy have a brief fight, Billy says he never wants to speak to Mandy again. The next day, Billy is over
Just the Two of Pus
When a doctor is unable to cure Sperg of his severe case of acne, Sperg goes to see a fortune teller that deals with ski
Chocolate Sailor
While reading an Underworld comic book, Billy finds an advertisement for "Chocolate Sailors", a delicious chocolate cand
The Good, the Bad and the Toothless
When Billy has a loose tooth he cannot wait for the Tooth Fairy to appear to give him money. Mandy, who does not believe
That's My Mummy
When Billy hangs out at Irwin's house, he finds a living mummy in the bathroom. Seeing as Irwin gets nervous, and as Bil
Toys Will Be Toys
Thanks to Mandy, Billy decides to get rid of his "Dinobonoid" action figures thinking he is too old for them. Grim makes
The Secret Snake Club
At school, Billy, Mandy, and Irwin look for a club to join. Irwin plans to join the Macrame club to meet girls; Billy in
He's Not Dead, He's My Mascot
When Billy and Mandy's school is preparing for a big game, Mindy entrusts the care of the school's mascot, Fluffy Cat, t
Hog Wild
As Billy is tired of all the rules in his house, he cannot resist the urge to try his father's new motorcycle. The motor
The Bad News Ghouls
After Billy's baseball team loses badly against Mindy's, Grim decides to coach them. Mandy is not allowed on the team, a
The House of No Tomorrow
While at Sassy Cat Land, the theme park dedicated to Sassy Cat (and to ridiculously long lines), Billy, Mandy, and Grim
Happy Huggy Stuffy Bears
After a trip to the mall, Mandy becomes the spokesperson for Happy Huggy Stuffy Bears, a new stuffed toy in town. After
The Secret Decoder Ring
When Billy finally gets a "secret decoder ring" in his Blasto Bits cereal, he receives a holographic message from a stra
Wild Parts
One night a strange odor travels through the city, prompting the noses of all the people, including Billy's, to follow i
The Problem with Billy
When Billy goes into the mud for the fifth time in the day while wearing his white tuxedo before a wedding, Grim tries t
Wishbones
After Grim's robe comes out of the washing machine, Billy and Mandy find Thromnambular, a talking skull with ruby eyes a
Dream Mutt
When Billy gets the opportunity to adopt one of four dogs, he says he wants them all. Grim uses his scythe to magically
Scythe for Sale
To raise money to buy Sea-Critters (similar to Sea-Monkeys), Billy has a garage sale where he sells Grim's scythe to Irw
Jeffy's Web
When Billy gets under his house's foundation, he encounters again his "son", Jeff the Spider, who has just laid eggs. Je
Irwin Gets a Clue
After seeing Billy, Mandy and Grim battling a strange creature, Irwin again feels rejected by Mandy. Hoss Delgado, spect
Duck!
After Grim has a nice dream, a nightmare escapes the back of his head in the shape of a supernatural, invisible duck tha
Aren't You Chupacabra to See Me?
After being utterly bored of watching the same movie 60 times in a row, Grim takes Billy and Mandy to "Underworld Video"
Zip Your Fly
Billy and Mandy find a supernatural zipper from Grim's robe, and while Billy uses it to create mischief, Mandy gets hers
Puddle Jumping
When Billy jumps into a supernatural puddle (a Cosmic Sinkhole, according to Grim), it takes him to the home of Granny A
Runaway Pants
At school it is time for the "Presidents Fitness Test", but Billy is absolutely unfit for exercise. On the other hand, N
Scythe 2.0
After Grim's scythe fails to open a portal, he decides to sharpen it, but the blade breaks. Billy, Mandy and Grim go to
The Firebird Sweet
When Billy buys a new cereal, a phoenix emerges from the box and attaches to his head, annoying everybody. Since the pho
The Bubble with Billy
When Billy desperately wants chewing gum at school, Grim gives him a bottomless gumball machine, but warns him not to sw
Billy Idiot
When Billy is accepted to Mrs. Pollywinkle's dancing academy, his father tries to persuade him to forget about dancing b
Home of the Ancients
When Grim misuses his powers to play bowling with asteroids, he is taken to the Underworld court and sentenced to 50 hou
My Fair Mandy
When it's scurvy-prevention day at school, Mindy parades in her float in anticipation for the Little Miss Scurvy beauty
One Crazy Summoner
When Billy's parents are attacked by an anaconda, Billy suggest visiting boy wizard Nigel Planter, because he can talk t
Guess What's Coming to Dinner?
When Billy's parents leave for their second honeymoon, Billy is left alone at the worst possible moment, since he has in
Mommy Fiercest
Then Billy's mom, discovers crow's feet on her face, she panics and does not want to leave the bathroom. As Grim needs t
The Taking Tree
When Billy, Mandy and Grim notice things have been disappearing in the house, they set out to investigate using a supern
Reap Walking
When the mall's surveillance cameras capture Grim's silhouette attacking endangered owls, a naturalist named Corey Nebra
The Loser from the Earth's Core
When Nergal goes to visit Billy's family (his in-laws) for the weekend, he ends up staying with them over a year. When B
Ecto Cooler
As Billy desires to be "cool" like Sperg, he has an ectoplasmic manifestation coming out of his mouth. The ectoplasm gro
The Schlubs
As Grim watches the entire season of "My Troubled Pony" (parodying My Little Pony), he learns from Mandy that the show w
Prank Call of Cthulu
When Billy and Irwin start making prank calls, everybody knows that Billy is behind the calls because every telephone ha
Billy & Mandy Save Christmas
The day before Christmas, Billy, Mandy and Grim go to the shopping mall, where Mandy complains that Santa Claus is just
Billy Ocean
When Billy, Mandy and Grim go to the beach, Billy is swallowed by a whale known as Blubbery Joe, which also houses in he
Hill Billy
When Mandy and Grim tell Billy to quit watching TV and follow his life dreams, Billy gets into a chicken costume and dec
Keeper of the Reaper
When Billy's dad gets a promotion at his job, he tells his family they are going to move to another town, starting a dis
The Love That Dare Not Speak Its Name
When Billy decides he wants to grow up to be like Grim, he says nothing will stand in the way of their friendship. They
Major Cheese
Billy, Mandy and Grim visit Mighty Moe, an old man who has discovered the secret to add extra years to his lifespan: a g
Modern Primitives
When Billy digs his front yard he finds a frozen caveman, who is actually Fred Flintstone (from The Flintstones), but wh
Giant Billy and Mandy All Out Attack
When Billy and Irwin want to watch classic giant monsters movies, Grim decides to take them to Japan to see real monster
The Wrongest Yard
When Billy and Irwin are yet again bullied by Sperg, they decide to play for the school's football team so they are not
Druid, Where's My Car?
When Billy gets his kite stuck in a tree, he starts throwing objects at it to knock it down, including Mandy and a group
Herbicidal Maniac
When General Skarr tries to get rid of a weed in his otherwise perfect garden, he asks Grim to use his scythe to do the
Chaos Theory
When Mandy and Grim go to the warehouse store, Mandy notices that everything seems to be in order, lacking any presence
A Grim Day
When Billy goes to visit his maternal grandmother and Mandy decides to have the day for herself, Grim finds himself free
Pandora's Lunch Box
There is a new student in the school, named Dora (parodying Dora the Explorer), who insists on getting people to open he
Billy and Mandy vs. the Martians
When Billy destroys Grim's favorite childhood toy, Fancy Jake, Grim feels devastated and wishes he had never lost the li
Dumb-Dumbs and Dragons
As Billy sees Hoss Delgado's manliness is action again, Billy wishes to grow up to be a hero like him. Grim tells Billy
Fear and Loathing in Endsville
When Grim decides to visit again his childhood idol, the aged king of the vampires, Dracula, the latter suggest they dri
Dad Day Afternoon
As Billy and Mandy celebrate Father's Day, Grim becomes very depressed that he sits inside Billy's closet only listening
Scary Poppins
As Mandy returns from Billy's house, it is evident that Mandy's parents are extremely afraid of their daughter and her i
Hurter Monkey
When Mandy says even a trained monkey is more competent to do cleaning chores than Grim, and would complain less, Grim m
Goodbling and the Hip-Hop-Opotamus
At a school fair, Grim's scythe accidentally transforms the dull Principal Goodvibes and his hippopotamus into gangster
Spidermandy
When Billy finds his "son" Jeff the Spider lying in his bed with "Spider Pox", he goes to Mandy for help to get rid of t
Be A-Fred, Be Very A-Fred
As Grim appears in an Underworld TV commercial for "Big Move" laxative pills, an accompanying contest promises a day wit
The Crass Unicorn
As Billy notices Mandy and Grim's usual negative attitude, he wishes they were in a magical land of happiness, so Grim t
Billy & Mandy Begins
As Billy, Mandy, Grim, and Irwin hang from a rope about to be eaten by a giant sea serpent, Irwin wonders how they came
Everything Breaks
As Billy behaves more reckless than ever and cannot stop breaking everything in sight, Mandy thinks he should go some pl
The Show that Dare Not Speak Its Name
When Grim leaves the house to meet someone he met on the internet, Billy looks inside Grim's trunk for something to ente
The Secret Snake Club vs P.E.
As Billy realizes the three geeks of the Secret Snake Club get doctor's notes to avoid Physical Education (P.E.) class,
King Tooten Pooten
When Billy, Mandy and Grim attend an Ancient Egypt exhibit at the museum, they meet with Irwin who explains that, as his
Billy Gets an "A"
When Billy fails an important test, the result of which will go into his permanent record, he asks Grim to magically alt
Yeti or Not, Here I Come
After watching the Unsolvable Mysteries TV show, Grim realizes he forgot a million years ago to reap the Abominable Snow
Nergal's Pizza
When Nergal comes to tell the guys about his new pizza joint, Grim thinks he can do better by using his Granny's recipe.
Hey, Water You Doing?
After Billy, Mandy and Grim are disappointed with the Sassy Cat amusement park submarine attraction, Grim uses his power
Company Halt
As General Skarr is once again annoyed by Billy, Hector Con Carne and Major Dr. Ghastly arrive in his house with the int
Anger Mismanagement
As General Skarr has trouble finding a job, the recruiter tells him to attend anger management classes if he wants to wo
Waking Nightmare
When Mandy finds Billy playing with Grim's gigantic dog, Cerberus, she tells Grim to keep Billy under tight control beca
Beware of the Undertoad
When Billy, Mandy and Grim once again go to the beach, Grim warns Billy to avoid swimming too far, because the "undertoa
The Greatest Love Story Ever Told Ever
When Irwin lacks the courage to ask Mandy to go with him to the Valentine's Day school dance, he tells Nergal Jr. to do
Detention X
When Billy accidentally food-poisons Miss Butterbean, Principal Goodvibes offers Grim the job of substitute teacher, whi
Billy and Mandy Moon the Moon
When Billy is sent to bed after playing with his Dr. Brainiac action figure, he wishes he had an adventure. He notices a
Dracula Must Die!
When vampire hunter Lionel Van Helsing prepares to kill Dracula, Billy, Mandy, and Grim arrive to stop him since Dracula
Short Tall Tales
As Billy, Mandy, and Irwin need to write a school report on tall tales, Grim tells outrageous tall tales about Pecos Bil
Nigel Planter and the Order of the Peanuts
When Billy, Mandy and Grim go to a joke shop, they find the owner is former boy wizard Nigel Planter, who reveals that h
The Incredible Shrinking Mandy
When Grim cannot take any more abuse from Mandy, Billy tries using Grim's scythe to shrink her to mouse size. Instead of
El Dia De Los Muertos Estupidos
When Billy's dad drives Billy, Mandy and Grim to the hamburger restaurant, they somehow end up in Mexico. There, the peo
Heartburn
When Billy starts taking pictures with a camera found in Grim's trunk, Grim tells him that is an Underworld's True-heart
Popular Cast
Related TV Series
Rugrats
The Weekenders
Pink Panther and Pals
Timon and Pumbaa
Chowder
Back at the Barnyard
My Gym Partner's a Monkey
Animaniacs
Chip 'n' Dale Rescue Rangers
Fish Hooks
Catscratch
The Cleveland Show
All Hail King Julien: Exiled
Kid vs. Kat
I Am Weasel
Monsters at Work
The Addams Family
The Pink Panther
Kenan & Kel
