25. The Battle for Subterranea-Tania

2017 - Season 1

Billy throws a goodbye party for all his new friends, but things go awry when the celebration is interrupted by an alien invasion!

24. Rat's Entertainment!

2017 - Season 1

23. The Glorp of the Gorks

2017 - Season 1

22. Double Bubble

2017 - Season 1

21. Sluggy

2017 - Season 1

20. Jared

2017 - Season 1

19. Wretcherous Treachery

2017 - Season 1

Count Wretcher has a plan to travel to the Surface World and cover the Earth in sludge. When Billy's new friend Jared becomes fast friends with Zeke and Marsha, Billy gets jealous.

18. Silly Spheres

2017 - Season 1

17. Ol' MacBilly

2017 - Season 1

Billy loses confidence in his hair, luckily he discovers a wig shop. When the Hag Witch visits her sisters, she gives Billy and Tony one order: stay out of her magical cabinet!

16. The Telltale Wart

2017 - Season 1

15. Billy/Willie

2017 - Season 1

14. Tommy X

2017 - Season 1

13. The Battle for Subterranea-Tania / The Battle for Subterranea-Tania part II

No release date yet

Billy throws a goodbye party for all his new friends, but things go awry when the celebration is interrupted by an alien invasion!

12. The Glorp of the Gorks / Rat's Entertainment!

No release date yet

The Gorks’ most sacred, sticky relic goes missing and Billy leads the investigation to find the thief. The gang try to cheer up Anaximander by staging a huge rat-themed stage show.

11. Sluggy / Double Bubble

No release date yet

Anaximander won’t pay attention to Billy, so Billy finds a new pet. Zeke’s habit of ignoring the trash on the roof gets him and Billy into a predicament.

10. Wretcherous Treachery / Jared

No release date yet

Count Wretcher has a plan to travel to the Surface World and cover the Earth in sludge. When Billy's new friend Jared becomes fast friends with Zeke and Marsha, Billy gets jealous.

9. Ol' MacBilly / Silly Spheres

No release date yet

Billy loses confidence in his hair, luckily he discovers a wig shop. When the Hag Witch visits her sisters, she gives Billy and Tony one order: stay out of her magical cabinet!

8. Billy / Willie / The Telltale Wart

No release date yet

Zartran convinces Billy to pretend to be the nephew of an old lady to scam her out of her secret treasure. Billy is jealous of his new friend's wart and becomes obsessed with it.

7. "K" is for Klutz / Tommy X

No release date yet

Billy and Zeke try to figure out Marsha's unexplained bout of klutziness. Zeke is blown away when his favorite extreme sports hero, Tommy X, arrives at their house.

6. Beastie Billy / Zartran

No release date yet

Billy takes extreme measures when Marsha convinces him he has brought a curse upon himself. Billy invites a heroic warrior named Zartran to stay at his house.

5. Hey Judy / Welcome to the Hag House

No release date yet

Billy meets a new friend and a new romantic interest on the same day and is forced to choose between the two. Billy stumbles upon a wicked chemistry master.

4. The Mushroom Prince / Count Wretcher

No release date yet

Billy repeatedly tries to steal Marsha's diary. Billy is excited to meet Count Wretcher, an eccentric neighbor and fellow inventor.

3. The Date / The Troggies Next Door

No release date yet

Billy and Zeke help Marsha find romance, but an unexpected guest could ruin everything. When Billy and Zeke meet the neighboring Troggies, an epic sports showdown ensues.

2. Calzones / Crab Hands

No release date yet

Zeke, the King of Calzones, must defend his title when a rival chef enters the picture. Billy invents a grafting machine and starts adding different creature parts to his body.

1. Lab Friends... Forever? / Surviving Billy

No release date yet

Billy’s science project goes horribly wrong, and he and his two friends find themselves stuck in a strange land. Billy, Zeke and Marsha must find their way back to the Cheeserator.