The Grim Adventures of Billy and Mandy
Season 1, Episode 7: Fiend Is Like Friend Without the 'R'
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Billy wanders into a junkyard, where a massive hole in the earth opens up and pulls him down in. Later, Mandy and Grim get pulled in as well. They land at the center of the Earth, which is home of Nergal, a devilish creature. The lonely Nergal, who has been watching Billy and Mandy for some time, wants Grim to hand over the kids to him so they can be his friends forever. Grim happily leaves the kids behind as he returns to the surface; however, he later goes back for them because he can't handle the guilt of abandoning his friends. In the end, Grim is defeated by Nergal's electrified tentacles, but Mandy defeats Nergal merely by kicking him in the shin.
All Episodes - Season 1
Episode 1
Meet the Reaper
Episode 2
Skeletons in the Water Closet
Episode 3
Opposite Day
Episode 4
Look Alive!
Episode 5
Mortal Dilemma
Episode 6
Get Out of My Head!
Episode 7
Fiend Is Like Friend Without the 'R'
Episode 8
Recipe for Disaster
Episode 9
A Dumb Wish
Episode 10
Grim vs. Mom
Episode 11
Tastes Like Chicken
Episode 12
Grim or Gregory?
Episode 13
Something Stupid This Way Comes
Episode 14
A Grim Surprise
Episode 15
Beasts and Barbarians
Episode 16
Hoss Delgado: Spectral Exterminator
Episode 17
To Eris Human
Episode 18
Billy's Growth Spurt
Episode 19
Billy & the Bully
Episode 20
Big Trouble in Billy's Basement
Episode 21
Tickle Me Mandy
Episode 22
Little Rock of Horrors
Episode 23
Dream a Little Dream