• Air date: 13 Jun '03 9 episodes
      In this season, The Grim Adventures of Billy & Mandy is a standalone show, separate from Evil Con Carne, although the ninth episode, a sketch of Malo Con Carne is tied with other two episodes of Billy and Mandy. There were 9 regular episodes in this season, and the half-hour Halloween special, in which Billy, Mandy and Grim face against Jack O'Lantern. This season introduces the boy-wizard Nigel Planter and supporting characters such as Dean Toadblatt, which constitutes a parody of the Harry
  • List of Episodes (9)
    • 1. Toadblatt's School of Sorcery / Educating Grim / It's Hokey Mon!

      13 Jun '03
      "Toadblatt's School of Sorcery" In a parody of the Harry Potter series, Grim sends Billy and Mandy to a sorcery school so the latter duo could avoid boring summer camps they were supposed to go to. The sorcery school is owned by Dean Toadblatt, an anthropomorphic frog. Billy and Mandy are sent to the most hated house on the school, Weaselthorpe, while Grim becomes a prefect for a more loved house, Gunderstank. Billy and Mandy team up with boy wizard Nigel Planter to sabotage Gunderstank.
    • 2. Night of The Living Grim / Brown Evil / Brown Evil: Part 2

      20 Jun '03
      "Night of the Living Grim" Grim is lying sick in bed with "Encroaching Doom Syndrome". The Underworld doctors are not able to help Grim, and he becomes a human being. Back in Endsville, Grim seems attractive to women, but he ends up being punched by jealous boyfriends, especially Billy's dad Harold. Grim covers himself in the mucus that he produced when he was sick and becomes a skeleton again, and Billy tries it too. "Brown Evil" Taking inspiration from his Pat the Baker video game, Billy
    • 3. Mandy the Merciless / Creating Chaos / The Really Odd Couple

      27 Jun '03
      "Mandy, the Merciless" On a hot day when Billy, Mandy, and Irwin are bored, Grim uses a crystal ball to show them the future. In the distant future, Mandy has turned herself into a giant worm-like creature to be immortal, and now rules the whole world. Mandy gives false information to a clone of Billy to capture the members of a resistance that try to defeat her. The episode parodies the science fiction novel God Emperor of Dune by Frank Herbert. "Creating Chaos" When Billy, Mandy, and Grim
    • 4. Who Killed Who / Tween Wolf

      04 Jul '03
      "Who Killed Who?" After excluding Mandy from their board game Who Killed Who? for being a girl, Billy and Irwin mistakenly throw their dice into the backyard of a haunted house. Grim warns them about the ghost of Mrs. Doolin, a lady that lived there. Mandy dares to go inside to retrieve the dice, and she befriends Mrs. Doolin, who is alive and well, and who says that all the stories told about her (that anything that went beyond her fence into her garden never came back) are inventions from
    • 5. Grim In Love / Crushed! / Love is Evol Spelled Backwards

      11 Jul '03
      "Grim in Love" When Billy, Mandy and Grim go to the beach, Grim falls in love with a goth woman named Malaria. Grim is having a good time with his girlfriend, but Mandy assures him that will change when he tells her that he is not human. In the following date, Grim demonstrates his supernatural powers while dancing and, as predicted, Malaria leaves in panic. "Crushed!" At school, Mandy rejects Irwin's invitation to go to the school dance with him. Billy introduces his foreign and mysterious,
    • 6. The Crawling Niceness / Smarten Up ! / The Grim Show

      18 Jul '03
      "The Crawling Niceness" Billy takes a big egg found in Grim's trunk and hatches it expecting a duck. Instead, Jeff the Spider is born, who considers Billy his father. Despite Jeff trying to please Billy in any possible way, Billy is terrified of Jeff and wants him squished. The exterminator chose not to squish Jeff because he is a nice bug. "Smarten Up!" Billy is worried about failing an upcoming Math test, so Grim gives him a "bookworm", which will make him much smarter. Milkshakes, Billy's
    • 7. Son Of Nergal / Sister Grim / Go - Kart 3000

      25 Jul '03
      "Son of Nergal" Billy and Mandy are sent to "Winter Camp", where they meet Nergal's son, Nergal Jr. Just like his father, Junior tries making friends, although not in the best way possible. Junior attacks the campers, freezes them and, using his shape-shifting abilities, takes over their appearances. Billy decides to be Junior's friend, but he is scared away at the moment Junior shows him his true form. "Sister Grim" After being accidentally hit by Billy, Grim lands in a can of white paint in
    • 8. Grim For a Day / Chicken Ball Z / The Halls of Time

      01 Sep '03
      "Grim for a Day" After a lousy night for Grim, Billy and Grim argue about who has the hardest time, the kid or the Reaper of Souls. Mandy proposes they switch places for the day to find out. Grim seems to be having a good time, acting like a silly kid, while Billy is bored waiting for his old victim, Mr. Voorhees, to open the door. Billy transforms into a short skeleton, while Grim transforms into a taller version of Billy. "Chicken Ball Z" Grim's refusal to help Mandy win a karate tournament
    • 9. Billy and Mandy's Jacked Up Halloween

      31 Oct '03
      Billy, Mandy and Grim go trick-or-treating for Halloween, and Irwin is left behind because he needs a scarier costume. After pulling a trick on an old lady, and getting some candies, Grim tells the story of why people pull pranks, which he was partially responsible for. He tells about Jack, a prankster of the old Endsville who just never knew when to stop. One day, the citizens decided to punish him for his constant pranks, and they pulled a prank on the queen, but signed it "From: Jack"; in