Seasons
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Season 1 Aug. 24, 2001
Season 2 Jun. 13, 2003
Season 3 Jun. 11, 2004
- Episode 1: Spider's Little Daddy
- Episode 2: Tricycle of Terror
- Episode 3: Dumb Luck
- Episode 4: No Body Loves Grim
- Episode 5: Lil' Porkchop
- Episode 6: Skarred for Life
- Episode 7: House of Pain
- Episode 8: A Grim Prophecy
- Episode 9: Mandy Bites Dog
- Episode 10: Nursery Crimes
- Episode 11: My Peeps
- Episode 12: Nigel Planter and the Chamber Pot of Secrets
- Episode 13: Circus of Fear
- Episode 14: Bully Boogie
- Episode 15: Here Thar Be Dwarves!
- Episode 16: Which Came First?
Season 4 Feb. 25, 2005
- Episode 1: The Secret Snake Club
- Episode 2: He's Not Dead, He's My Mascot
- Episode 3: Hog Wild
- Episode 4: The Bad News Ghouls
- Episode 5: The House of No Tomorrow
- Episode 6: Happy Huggy Stuffy Bears
- Episode 7: The Secret Decoder Ring
- Episode 8: Wild Parts
- Episode 9: The Problem with Billy
- Episode 10: Wishbones
- Episode 11: Dream Mutt
- Episode 12: Scythe for Sale
- Episode 13: Jeffy's Web
Season 5 Jul. 29, 2005
Season 6 Jan. 06, 2006
- Episode 1: Billy Ocean
- Episode 2: Hill Billy
- Episode 3: Keeper of the Reaper
- Episode 4: The Love That Dare Not Speak Its Name
- Episode 5: Major Cheese
- Episode 6: Modern Primitives
- Episode 7: Giant Billy and Mandy All Out Attack
- Episode 8: The Wrongest Yard
- Episode 9: Druid, Where's My Car?
- Episode 10: Herbicidal Maniac
- Episode 11: Chaos Theory
- Episode 12: A Grim Day
- Episode 13: Pandora's Lunch Box
Season 7 Jun. 06, 2006
- Episode 1: Everything Breaks
- Episode 2: The Show that Dare Not Speak Its Name
- Episode 3: The Secret Snake Club vs P.E.
- Episode 4: King Tooten Pooten
- Episode 5: Billy Gets an "A"
- Episode 6: Yeti or Not, Here I Come
- Episode 7: Nergal's Pizza
- Episode 8: Hey, Water You Doing?
- Episode 9: Company Halt
- Episode 10: Anger Mismanagement
- Episode 11: Waking Nightmare
The Grim Adventures of Billy and Mandy Season 4 Episode 9
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 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.