Season 4

Mandy joins the Secret Snake Club where they call forth an ancient entity to save nerds from persecution.

Mindy leaves the school mascot with Billy for safekeeping and the animal mischief leaves no one unscathed.

Billy’s dad gets a new motorcycle just in time for Billy’s rebellion.

Baseball gets scary when Grim brings in some dead ringers to help Billy & Irwin defeat Mindy’s team.

Billy, Grim, and Mandy visit a closed amusement park attraction and find out why they should fear the future.

Mandy’s burgeoning acting career unleashes toys with an ulterior motive.

An acquaintance from Grim’s past attempts to entice Endsville’s children to free her from an ancient high school curse.

Billy’s nose is lured away by a Nasalmancer looking for the ultimate scent-sation.

Billy’s Dad regales Grim and Mandy with tales of Billy’s mental prowess.

A mystical skull with nine wishes to bestow grants desires with a side of poetic justice.

Grim concocts the perfect dog for Billy, but the dog has his own ideas about who the master is.

Absolute power corrupts Irwin absolutely when Billy sells him Grim’s scythe by mistake.

Billy’s son Jeffy is about to be a dad… or a mom, and Billy must deal with his fear of many spiders.

Irwin hopes to win Mandy’s affection by learning how to be cool from Hoss Delgado, Spectral Exterminator.

It’s a comedy of bad manners when Endsville is haunted by an invisible Duck.

Billy’s new best friend is sucking the life out of him.

It’s all fun and games until Mandy’s serious wardrobe malfunction turns a prank into anarchy.

Summer is always more fun with an interdimensional blow up swimming pool.

Billy convinces Nergal Jr. to help him cheat on the Presidential Fitness Test with runaway success.

Billy convinces Nergal Jr. to help him cheat on the Presidential Fitness Test with runaway success.

Eris is back to wreak havoc on Billy, Mandy, and Grim with her delicious new plot.

Billy can’t get enough of Grim’s supernatural chewing gum until it blows up in his face.

Dancing school takes talent, hard work… and your soul!

Even Dracula, the Wolfman, and the Bride of Frankenstein have gotten old, but they’re still cool to Grim.