The Grim Adventures of Billy and Mandy Season 1 Episode release dates & where to watch

1. Meet the Reaper

Billy and Mandy, two neighbor kids, play a game with the Grim Reaper for the soul of a sick hamster.

2. Skeletons in the Water Closet

Billy's overprotective mom discovers the Grim Reaper sleeping in her son's room.

3. Opposite Day

Grim's patience and sanity are put to the test as he is forced to deal with an unconventional holiday where everything means the reverse of what it normally does.

4. Look Alive!

The Grim Reaper confesses to a secret desire to be a swimsuit model. Can Billy and Mandy put a little bit of life into the old guy and make his dream come true?

5. Mortal Dilemma

Grim misses his job and goes out on the town hoping to recapture some of the glory of his past. After rescuing a doomed skateboarder, Grim begins to question his purpose in the universe.

6. Get Out of My Head!

Grim teaches Billy how to take control of someone else's body. Billy, unfortunately, makes the mistake of trying his new skill out on Mandy.

7. Fiend Is Like Friend Without the 'R'

Billy and Mandy are kidnapped by another supernatural creature. Grim must decide if he'd rather rescue his "friends" or just relax in a lawn chair.

8. Recipe for Disaster

After Billy eats all of the Person Scout cookies the kids are supposed to be selling, Grim saves the day with his Great Aunt's secret recipe. The whole town discovers that some recipes should be kept secret.

9. A Dumb Wish

Billy and Mandy discover that Grim's mom is a genie. Mandy is soon in control of the only remaining wish, with Grim and Billy desperately trying to curry favor.

10. Grim vs. Mom

Billy’s Mom returns, bent on taking vengeance on Grim!

11. Tastes Like Chicken

After some shoddy detective work, Billy and Grim deduce that Mandy is a cannibal and has eaten everyone in the neighborhood! Billy decides to confront Mandy before she eats him!

12. Grim or Gregory?

While on a Halloween excursion, Grim finds himself mistaken for a young boy named Gregory. Now it’s up to Billy and Mandy to return Gregory to his mom and retrieve their wayward Grim.

13. Something Stupid This Way Comes

Nergal returns, trying to win friends with a giant carnival. Billy takes up his cause, revealing to Nergal the five C’s of friendship.

14. A Grim Surprise

Billy and Grim plan a surprise birthday party for Mandy, only to succumb to a surprise of their own.

15. Beasts and Barbarians

Billy and Irwin are addicted to the video game “Beasts & Barbarians.” Mandy and Grim work to cure Billy and Irwin of their addiction by venturing to another dimension to give Billy and Irwin a taste of “the real thing.”

16. Hoss Delgado: Spectral Exterminator

Grim must evade extermination at the hands of Hoss Delgado, Spectral Exterminator!

17. To Eris Human

Eris, the Goddess of Chaos, arrives at the Endsville mall. She takes Mandy under her wing while Grim pines over his unrequited love for Eris.

18. Billy's Growth Spurt

Billy eats too much junk food and gets a small growth on his back. It grows and grows until it becomes an evil pint-sized Billy! Can Mandy and Grim get rid of the evil growth before it terrorizes the neighborhood?!

19. Billy & the Bully

Billy runs afoul of Sperg, the school bully. With the help of Mandy and Grim, will Billy get Sperg to leave him alone?

20. Big Trouble in Billy's Basement

Billy steals Grim’s “bad book” and accidentally brings about the beginning of an apocalypse. Hoss Delgado returns to lend a hand as Grim and Mandy try to stop Billy from bringing existence to an end!

21. Tickle Me Mandy

Mandy goes away for the weekend. Billy is a wreck without Mandy. So Grim makes Billy a new Mandy out of old toys. But this new Mandy is not all she’s cracked up to be.

22. Little Rock of Horrors

Billy befriends a giant brain eating meteor in his backyard.

23. Dream a Little Dream Finale

Grim, Billy and Mandy eat some bad pizza, resulting in a series of bizarre and mind bending dreams.