The Grim Adventures of Billy and Mandy: Season 4
Season 4 Lore Primer
Key plot threads, lore context, and character stakes you need to remember before diving into this season.
- Picks up essential narrative continuity directly following the events of The Grim Adventures of Billy and Mandy Season 3.
- Character alliances, factions, and personal loyalties undergo significant shifts under escalating stakes.
- Addresses unresolved cliffhangers and thematic mysteries introduced during previous seasons.
- Establishes the primary seasonal conflict that drives serialized character arcs toward the finale.
Episode Guide
Season 4 Progress Shield
The Secret Snake Club
Feb 25, 2005
Mandy joins the Secret Snake Club where they call forth an ancient entity to save nerds from persecution.
He's Not Dead, He's My Mascot
Apr 1, 2005
Mindy leaves the school mascot with Billy for safekeeping and the animal mischief leaves no one unscathed.
Hog Wild
Apr 1, 2005
Billy’s dad gets a new motorcycle just in time for Billy’s rebellion.
The Bad News Ghouls
Apr 8, 2005
Baseball gets scary when Grim brings in some dead ringers to help Billy & Irwin defeat Mindy’s team.
The House of No Tomorrow
Apr 8, 2005
Billy, Grim, and Mandy visit a closed amusement park attraction and find out why they should fear the future.
Happy Huggy Stuffy Bears
Apr 15, 2005
Mandy’s burgeoning acting career unleashes toys with an ulterior motive.
The Secret Decoder Ring
Apr 15, 2005
An acquaintance from Grim’s past attempts to entice Endsville’s children to free her from an ancient high school curse.
Wild Parts
Jun 3, 2005
Billy’s nose is lured away by a Nasalmancer looking for the ultimate scent-sation.
The Problem with Billy
Jun 3, 2005
Billy’s Dad regales Grim and Mandy with tales of Billy’s mental prowess.
Wishbones
Jun 10, 2005
A mystical skull with nine wishes to bestow grants desires with a side of poetic justice.
Dream Mutt
Jun 17, 2005
Grim concocts the perfect dog for Billy, but the dog has his own ideas about who the master is.
Scythe for Sale
Jun 17, 2005
Absolute power corrupts Irwin absolutely when Billy sells him Grim’s scythe by mistake.
Jeffy's Web
Jun 24, 2005
Billy’s son Jeffy is about to be a dad… or a mom, and Billy must deal with his fear of many spiders.
Irwin Gets a Clue
Jun 24, 2005 · 30 min
Irwin hopes to win Mandy’s affection by learning how to be cool from Hoss Delgado, Spectral Exterminator.
Duck!
Jun 24, 2005
It’s a comedy of bad manners when Endsville is haunted by an invisible Duck.
Aren't You Chupacabra to See Me?
Jun 24, 2005
Billy’s new best friend is sucking the life out of him.
Zip Your Fly
Jun 27, 2005
It’s all fun and games until Mandy’s serious wardrobe malfunction turns a prank into anarchy.
Puddle Jumping
Jun 27, 2005
Summer is always more fun with an interdimensional blow up swimming pool.
Runaway Pants
Jun 28, 2005
Billy convinces Nergal Jr. to help him cheat on the Presidential Fitness Test with runaway success.
Scythe 2.0
Jun 28, 2005
Billy convinces Nergal Jr. to help him cheat on the Presidential Fitness Test with runaway success.
The Firebird Sweet
Jun 29, 2006
Eris is back to wreak havoc on Billy, Mandy, and Grim with her delicious new plot.
The Bubble with Billy
Jun 29, 2006
Billy can’t get enough of Grim’s supernatural chewing gum until it blows up in his face.
Home of the Ancients
Jun 30, 2005
Even Dracula, the Wolfman, and the Bride of Frankenstein have gotten old, but they’re still cool to Grim.