A scene of Endsville two weeks into the future shows a dystopian world ruled by the "Lord of Horror"...

On a rainy day, giant spiders appear in Billy and Mandy's school and start kidnapping the children o...

Billy, Irwin and Mandy go trick-or-treating on Halloween, and an evil marshmallow bunny attacks chil...

While Billy's Dad is underwear shopping, Billy wears his dad's lucky pants, and accidently rips them...

Billy looks into Grim's trunk and sees a monster and names it Myron. But when Billy brings Myron out...

Billy's Dad forgot to buy Billy's present for his birthday again! Everytime Billy's Dad buys a prese...

Grim decides to make a cake for Billy's birthday, but he and Mandy end up making a Devil's Food cake...

Irwin finishes wrapping Billy's present and buys a huge present for Mandy as well. He decides it is...

Dracula was heading for the bingo hall when he ran into Pud'n who was on his way to Billy's party. D...

Billy blows out the candles off his cake and Dracula turns to leave, but Billy stops him and forces...

Irwin has a dream sequence of taking Mandy out for the time of her life.

Dracula tries to help Irwin win over Mandy.

Irwin's grandmother, Tanya, embarrasses Irwin in an elevator ride with Mandy.

Irwin's future grandchild travels back in time to motivate modern-day Irwin to give Mandy a box of c...

Grim and Dracula go on a double date.

Irwin tries to win over Mandy.

Grim has difficulty teaching Billy how to tie his shoes.

Irwin wants to take Mandy out to dinner, and schemes to get money from the tooth fairy to pay for it...

Billy battles his messy room.

Dracula participates in his senior home's self-defense course by role-playing as a "victim."

Billy builds a snowman that comes to life.

Irwin wants to impress Mandy and goes to Grim for help.

When the gang frees Thromnambular, the wish-granting skull, from a lamp, Grim and Mandy bicker over...

When the Grim Reaper tries to take Billy's pet hamster, Mandy and Billy make a deal to save his life...

Billy's pet hamster, Mr. Snuggles, celebrates his 10th birthday, so the Grim Reaper comes for him. H...

Billy's mother, Gladys, first notices Grim in Billy's bed, then in the shower and subsequently start...

Billy and Mandy tell Grim it is "Opposite Day" and that, when they say something, they really mean t...

Grim is bored of being left alone while Billy and Mandy are not with him. Grim decides to fulfill hi...

Grim misses his life as the reaper of souls and, due to his bet, he cannot return to the Underworld,...

After watching a movie, Grim teaches Billy to possess people by jumping into their heads. Billy poss...

Billy wanders into a junkyard, where a massive hole in the earth opens up and pulls him down in. Lat...

Billy, Mandy, Grim and Pud'n are part of the "Person Scouts" (a Boy Scouts-esque organization) and n...

While Spring cleaning in the middle of November, Billy takes an old, cursed lamp from Grim's trunk....

After having a nervous breakdown and leaving the house in the first episode, Billy's mother, Gladys,...

With Irwin not answering the phone, Billy's parents missing and Mandy saying she wants "Billy for di...

It's Halloween, Billy, Mandy and Grim go trick-or-treating. Grim mistakes a woman for Atrocia, the h...

Nergal, the fiend from the center of the Earth, returns to the surface, emerging a carnival with him...

Billy tells Grim to help him throw a surprise birthday party for Mandy. Then, a reluctant Grim helps...

Billy and Irwin have been playing their favorite video game, Beasts and Barbarians, for three days n...

Billy, Mandy, and Grim go to the museum on a school trip. There, they meet Hoss Delgado, self-appoin...

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

Billy eats too much junk food that makes him feel sick. Grim prepares him a remedy using his granny'...

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

After taking the Underworld's "Bad Book" from Grim, Billy becomes possessed by an evil entity. Then,...

Mandy and her parents leave the city for a day, which makes Billy feel lonely. Then, Grim uses his s...

In this musical episode, which pays homage to Little Shop of Horrors, Billy befriends a singing brai...

Billy, Mandy, and Grim eat moldy pizza leftovers, and after falling asleep, they have nightmares. Bi...

Grim gets Billy and Mandy into sorcery school.

Mindy befriends Grim.

Grim brings monster cards to life.

Grim gets sick.

Zombies crave the brownies Billy makes.

Zombies crave the brownies Billy makes.

In the future, Mandy rules the world.

Billy helps Eris spread chaos.

Mandy and Billy are forced to share a room.

Mandy visits a haunted house.

Irwin turns into a werewolf.

Grim falls for a Goth girl.

Mandy develops a crush.

Nergal attempts to woo Billy's aunt.

Billy hatches a giant spider.

Grim tries to help Billy pass a test.

Grim tries to stop a show from being canceled.

Billy and Mandy contend with Nergal Jr.

Grim thinks he is a nun.

Grim and the children enter a kart competition.

Billy tries to show off at the Renaissance festival.

Grim sings in a band.

Billy and Mandy visit the Halls of Time.

Billy and Grim switch places for a day.

Mandy eats a magical ball of chicken.

A headless man from Grim's past uses Billy to steal Grim's scythe.

At a father-and-son picnic, Billy re-encounters with his spider "son", Jeff, in a dirty bathroom. On...

When Billy crashes his bicycle, he obtains a free tricycle from a mysterious boy in a supernatural p...

After spilling salt in a restaurant, and not throwing salt over his left shoulder, Billy starts havi...

Billy, Mandy and Grim go to the beach where Grim falls asleep and Billy buries him in sand. When the...

After he turns down his dad's invitation to go fishing, Billy gets a tiny, weakling, pet fish, which...

General Skarr buys a home in Endsville and becomes Billy's neighbor. After Skarr invites Billy into...

Lord Pain, a fearsome warrior from the Plain of Eternal Suffering, appears in Billy's house looking...

In this short, set in the Stone Age, a child version of Grim undertakes his first assignments as the...

When Mindy mocks Mandy's dumb and coward dog, Saliva, Mandy decides to train her dog to be meaner. A...

After Billy eats 19 creme-filled Atomic Frenzy Cakes he cannot sleep and wants Mandy to read him a b...

When Billy ruins his eyes by playing too many video games and looking directly into the Sun, Mandy a...

When Billy, Mandy and Grim go playing golf, they encounter boy wizard Nigel Planter again, who is th...

When Billy and Mandy are utterly bored, Grim takes them to Underworld's "Circus of Fear". The ringle...

After failing to scare a fifteen-year-old, the Boogeyman decides to visit his old middle-school vict...

As Billy walks into the woods to have a picnic, Yogi and a giant, feral version of Boo-Boo (from The...

While going to a science museum, Billy and Mandy's school bus breaks down in the middle of the deser...

Billy's first cousin from the center of the Earth, Nergal Jr. goes to school for the first time, but...

After watching a TV show, starring Captain Heifer and his Heifer Farms Brand Yogurt, Billy asks Grim...

Trying to get revenge at Mandy for bossing them all the time, Billy and Grim put her in the "Mask of...

When Billy sees his father shaving, he decides having a beard is cool and buys "Hair Raiser Tonique"...

After being bullied again by Sperg, Billy asks Grim to shrink him to enter Mandy's head to steal her...

When Billy forgets to do his history homework, Grim gives him a universal remote control to alter ti...

During a thunderstorm, a lightning bolt hits Grim's scythe, transporting Billy to Asgard, land of th...

Grim is annoyed by Billy who thinks that a shadow is following him. Grim takes Billy and Mandy to th...

After Billy wakes up from another nightmare involving clowns, he is more terrified than ever towards...

Thinking that the world is chaotic enough as it is, Eris, the goddess of chaos, decides to quit chao...

When Billy and Mandy have a brief fight, Billy says he never wants to speak to Mandy again. The next...

When a doctor is unable to cure Sperg of his severe case of acne, Sperg goes to see a fortune teller...

While reading an Underworld comic book, Billy finds an advertisement for "Chocolate Sailors", a deli...

When Billy has a loose tooth he cannot wait for the Tooth Fairy to appear to give him money. Mandy,...

When Billy hangs out at Irwin's house, he finds a living mummy in the bathroom. Seeing as Irwin gets...

Thanks to Mandy, Billy decides to get rid of his "Dinobonoid" action figures thinking he is too old...

At school, Billy, Mandy, and Irwin look for a club to join. Irwin plans to join the Macrame club to...

When Billy and Mandy's school is preparing for a big game, Mindy entrusts the care of the school's m...

As Billy is tired of all the rules in his house, he cannot resist the urge to try his father's new m...

After Billy's baseball team loses badly against Mindy's, Grim decides to coach them. Mandy is not al...

While at Sassy Cat Land, the theme park dedicated to Sassy Cat (and to ridiculously long lines), Bil...

After a trip to the mall, Mandy becomes the spokesperson for Happy Huggy Stuffy Bears, a new stuffed...

When Billy finally gets a "secret decoder ring" in his Blasto Bits cereal, he receives a holographic...

One night a strange odor travels through the city, prompting the noses of all the people, including...

When Billy goes into the mud for the fifth time in the day while wearing his white tuxedo before a w...

After Grim's robe comes out of the washing machine, Billy and Mandy find Thromnambular, a talking sk...

When Billy gets the opportunity to adopt one of four dogs, he says he wants them all. Grim uses his...

To raise money to buy Sea-Critters (similar to Sea-Monkeys), Billy has a garage sale where he sells...

When Billy gets under his house's foundation, he encounters again his "son", Jeff the Spider, who ha...

After seeing Billy, Mandy and Grim battling a strange creature, Irwin again feels rejected by Mandy....

After Grim has a nice dream, a nightmare escapes the back of his head in the shape of a supernatural...

After being utterly bored of watching the same movie 60 times in a row, Grim takes Billy and Mandy t...

Billy and Mandy find a supernatural zipper from Grim's robe, and while Billy uses it to create misch...

When Billy jumps into a supernatural puddle (a Cosmic Sinkhole, according to Grim), it takes him to...

At school it is time for the "Presidents Fitness Test", but Billy is absolutely unfit for exercise....

After Grim's scythe fails to open a portal, he decides to sharpen it, but the blade breaks. Billy, M...

When Billy buys a new cereal, a phoenix emerges from the box and attaches to his head, annoying ever...

When Billy desperately wants chewing gum at school, Grim gives him a bottomless gumball machine, but...

When Billy is accepted to Mrs. Pollywinkle's dancing academy, his father tries to persuade him to fo...

When Grim misuses his powers to play bowling with asteroids, he is taken to the Underworld court and...

When it's scurvy-prevention day at school, Mindy parades in her float in anticipation for the Little...

When Billy's parents are attacked by an anaconda, Billy suggest visiting boy wizard Nigel Planter, b...

When Billy's parents leave for their second honeymoon, Billy is left alone at the worst possible mom...

Then Billy's mom, discovers crow's feet on her face, she panics and does not want to leave the bathr...

When Billy, Mandy and Grim notice things have been disappearing in the house, they set out to invest...

When the mall's surveillance cameras capture Grim's silhouette attacking endangered owls, a naturali...

When Nergal goes to visit Billy's family (his in-laws) for the weekend, he ends up staying with them...

As Billy desires to be "cool" like Sperg, he has an ectoplasmic manifestation coming out of his mout...

As Grim watches the entire season of "My Troubled Pony" (parodying My Little Pony), he learns from M...

When Billy and Irwin start making prank calls, everybody knows that Billy is behind the calls becaus...

The day before Christmas, Billy, Mandy and Grim go to the shopping mall, where Mandy complains that...

When Billy, Mandy and Grim go to the beach, Billy is swallowed by a whale known as Blubbery Joe, whi...

When Mandy and Grim tell Billy to quit watching TV and follow his life dreams, Billy gets into a chi...

When Billy's dad gets a promotion at his job, he tells his family they are going to move to another...

When Billy decides he wants to grow up to be like Grim, he says nothing will stand in the way of the...

Billy, Mandy and Grim visit Mighty Moe, an old man who has discovered the secret to add extra years...

When Billy digs his front yard he finds a frozen caveman, who is actually Fred Flintstone (from The...

When Billy and Irwin want to watch classic giant monsters movies, Grim decides to take them to Japan...

When Billy and Irwin are yet again bullied by Sperg, they decide to play for the school's football t...

When Billy gets his kite stuck in a tree, he starts throwing objects at it to knock it down, includi...

When General Skarr tries to get rid of a weed in his otherwise perfect garden, he asks Grim to use h...

When Mandy and Grim go to the warehouse store, Mandy notices that everything seems to be in order, l...

When Billy goes to visit his maternal grandmother and Mandy decides to have the day for herself, Gri...

There is a new student in the school, named Dora (parodying Dora the Explorer), who insists on getti...

When Billy destroys Grim's favorite childhood toy, Fancy Jake, Grim feels devastated and wishes he h...

As Billy sees Hoss Delgado's manliness is action again, Billy wishes to grow up to be a hero like hi...

When Grim decides to visit again his childhood idol, the aged king of the vampires, Dracula, the lat...

As Billy and Mandy celebrate Father's Day, Grim becomes very depressed that he sits inside Billy's c...

As Mandy returns from Billy's house, it is evident that Mandy's parents are extremely afraid of thei...

When Mandy says even a trained monkey is more competent to do cleaning chores than Grim, and would c...

At a school fair, Grim's scythe accidentally transforms the dull Principal Goodvibes and his hippopo...

When Billy finds his "son" Jeff the Spider lying in his bed with "Spider Pox", he goes to Mandy for...

As Grim appears in an Underworld TV commercial for "Big Move" laxative pills, an accompanying contes...

As Billy notices Mandy and Grim's usual negative attitude, he wishes they were in a magical land of...

As Billy, Mandy, Grim, and Irwin hang from a rope about to be eaten by a giant sea serpent, Irwin wo...

As Billy behaves more reckless than ever and cannot stop breaking everything in sight, Mandy thinks...

When Grim leaves the house to meet someone he met on the internet, Billy looks inside Grim's trunk f...

As Billy realizes the three geeks of the Secret Snake Club get doctor's notes to avoid Physical Educ...

When Billy, Mandy and Grim attend an Ancient Egypt exhibit at the museum, they meet with Irwin who e...

When Billy fails an important test, the result of which will go into his permanent record, he asks G...

After watching the Unsolvable Mysteries TV show, Grim realizes he forgot a million years ago to reap...

When Nergal comes to tell the guys about his new pizza joint, Grim thinks he can do better by using...

After Billy, Mandy and Grim are disappointed with the Sassy Cat amusement park submarine attraction,...

As General Skarr is once again annoyed by Billy, Hector Con Carne and Major Dr. Ghastly arrive in hi...

As General Skarr has trouble finding a job, the recruiter tells him to attend anger management class...

When Mandy finds Billy playing with Grim's gigantic dog, Cerberus, she tells Grim to keep Billy unde...

When Billy, Mandy and Grim once again go to the beach, Grim warns Billy to avoid swimming too far, b...

When Irwin lacks the courage to ask Mandy to go with him to the Valentine's Day school dance, he tel...

When Billy accidentally food-poisons Miss Butterbean, Principal Goodvibes offers Grim the job of sub...

When Billy is sent to bed after playing with his Dr. Brainiac action figure, he wishes he had an adv...

When vampire hunter Lionel Van Helsing prepares to kill Dracula, Billy, Mandy, and Grim arrive to st...

As Billy, Mandy, and Irwin need to write a school report on tall tales, Grim tells outrageous tall t...

When Billy, Mandy and Grim go to a joke shop, they find the owner is former boy wizard Nigel Planter...

When Grim cannot take any more abuse from Mandy, Billy tries using Grim's scythe to shrink her to mo...

When Billy's dad drives Billy, Mandy and Grim to the hamburger restaurant, they somehow end up in Me...

When Billy starts taking pictures with a camera found in Grim's trunk, Grim tells him that is an Und...