The Grim Adventures of Billy and Mandy Wiki
The Problem with Billy
The Problem with Billy.jpg
Series The Grim Adventures of Billy & Mandy
Season 4
Production code 423
Writer Brett Varon
Broadcast information
Cartoon Network US Premiere June 3, 2005
Paired with Wild Parts
Chronological information
Wild Parts

The Problem with Billy is the 23rd episode from season 4 of The Grim Adventures of Billy & Mandy. Grim has had it with Billy's stupidity. He wants to know "what's his problem". Harold tells everybody a story about the past of Billy's life. Supposedly claiming Billy to be a genius!


When Billy goes into the mud for the fifth time in the day while wearing his white tuxedo before a wedding, Grim tries to figure out why Billy is so stupid. Billy's dad, Harold recounts Billy's life from his birth until he met Mandy and explains that Billy is not dumb, but actually a genius with a certified "Honorary Genius Degree". It is quite evident to Grim that Billy's problem is his equally dumb father, as he inherited Harold's stupidity. Billy is so irritated of waiting for Grim to clean him up that he gives up on Grim's scythe cleaning him up.


  • Story by: Brett Varon
  • Storyboard by: Brett Varon
  • Art direction: Rae McCarson
  • Directed by: Juli Hashiguchi


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  • This episode reveals that Billy and Mandy have known each other since they were toddlers.
    • Mandy's hairstyle as a toddler looks like Judy Jetson's from The Jetsons.
  • There's an online game based on this episode named Fast & Gassy.
  • When Billy's Dad shows Billy's diploma before he told the story, it looked different than the second time he showed the diploma.



Billy and Mandy - S4E10 - Wild Parts ~ The Problem With Billy