Billy develops an evil growth; Grim must evade extermination; Grim builds Billy a new Mandy out of old toys.

Nergal Jr. starts school with Billy and Mandy; Grim and Mandy must rescue Billy from a failed experiment.

Billy ends up with a streak of bad luck; when Grim's body gets separated, his body lives it up.

Grim teaches Billy how to take control of someone else's body. Grim confesses to a secret desire to be a swimsuit model. Grim goes out on the town hoping to recapture some of the glory of his past.

Grim challenges the kids to a game of limbo; Billy's mom is afraid of Grim.

Grim, Mandy and Billy must rescue Nigel Planter from Lord Moldybutt; Grim takes Billy and Mandy to the underworld's Circus of Fear.

`Lil' PorkChop': Grim accidentally causes Billy's small pet fish to grow into a giant; `Skarred for Life': General Skarr moves into Billy, Mandy and Grim's neighborhood.

`Spider's Little Daddy': Jeff the Spider returns to give his dad a present for Father's Day; `Tricycle of Terror': Billy's new bike attacks anyone who says bad things about it.

Billy demands fairy tales from Grim and Mandy when he cannot sleep; Billy loses his sight when he sits too close to the television.

Grim's new servant is asked to kill Billy and Mandy; a witch doctor shows Grim his terrifying future; Mandy borrows Grim's hell-hound.

Billy steals a book which begins an apocalypse.

Five-O-Clock Shadows/Terror of the Black Knight: Terror Of the Black Knight: Billy tries to show off at the Renaissance festival in a suit of cursed knight's armor conjured by Grim. HD Version

Nergal returns trying to make friends and fails; Billy and Grim throw a surprise birthday party for Mandy.

A headless man from Grim's past uses Billy to steal Grim's scythe.

Grim finds himself mistaken for a boy named Gregory while on a Halloween excursion; Grim learns his fate from his first customer; Billy and Grim deduce that Mandy is a cannibal.

Billy and Grim switch places for a day; Mandy eats a magical ball of chicken.

Grim becomes the lead singer of a rock band; Billy befriends a brain-eating meteor; the trio has strange dreams after eating bad pizza.

Billy falls to the center of the Earth and meets Nergal; Billy and Mandy need to sell cookies to win a badge.

Mandy visits a haunted house; Irwin turns into a werewolf.

Billy hatches a giant spider; Grim tries to help Billy pass a test; Grim tries to stop a show from being canceled.

Grim falls for a Goth girl; Mandy develops a crush; Nergal attempts to woo Billy's aunt.

Sometimes imaginary friends get lost or kids outgrow them and that's why Madame Foster started Foster's Home for Imaginary Friends. When kids dream up pals, they come to life and the house is filled with diverse characters waiting to be reunited or adopted to new kids. The series focuses on building friendships and the importance of friends.

A scrawny, 11-year-old chicken named Chicken reluctantly watches out for his beefy "little" sister, a 7-year-old cow named Cow. The unconventional offspring of two human parents, the two young animals navigate their way through suburbia, encountering problems not only at school, but with the devilish schemes of the Red Guy, a crimson-colored antagonist of many guises whose singular intent is to make the siblings' lives miserable. If the character design and offbeat humor of "Cow and Chicken" cause viewers to recall "The Ren & Stimpy Show," there's a good reason: creator David Feiss worked on that irreverent animated series as well.

Sleep tight, America! Your fate lies safely in the hands of Dexter, a child genius who whips up dazzling, world-saving inventions in his secret laboratory. Big sister Dee Dee frequently wrecks his experiments, but his bigger nemesis is Mandark, his brilliant rival at Huber Elementary School. Mom and Dad, of course, have no idea what their little angel is up to.

Twelve-year-old Finn battles evil in the Land of Ooo. Assisted by his magical dog, Jake, Finn roams the Land of Ooo righting wrongs and battling evil. Usually that evil comes in the form of the Ice King, who is in search of a wife. He's decided he should wed Princess Bubblegum, though she doesn't want to marry him. Still, he persists in trying to steal her away, and Finn and Jake, along with Lady Raincorn (a cross between a unicorn and a rainbow) do their best to keep her from harm.