When Hiccup discovers Toothless isn't the only Night Fury, he must seek "The Hidden World", a secret Dragon Utopia before a hired tyrant named Grimmel finds it first.

1. Raiders Return to Busy, Busy Berk
2. Dinner Talk / Grimmel's Introduction
3. Legend Has It / Cliffside Playtime
4. Toothless: Smitten
5. Worst Pep Talk Ever
6. Night Fury Killer
7. Exodus!
8. Third Date
9. New 'New Tail'
10. Furies in Love
11. Killer Dragons
12. With Love Comes a Great Waterfall
13. The Hidden World
14. Armada Battle
15. As Long As He's Safe
16. Once There Were Dragons
17. Together from Afar (How to Train Your Dragon: The Hidden World)