Hiccup and Toothless go on an exciting adventure and discover an island of new dragons.
| Directing | Tom Owens | Director |
| Writing | Simon Otto | Storyboard |
| Sound | Jonathan Null | Sound Editor |
| Production | Dean DeBlois | Executive Producer |
| Art | Kathy Altieri | Production Design |
| Production | Jennifer Dahlman | Associate Producer |
| Editing | John K. Carr | Editor |
| Production | Bonnie Arnold | Executive Producer |
| Writing | Adam F. Goldberg | Screenplay |
| Crew | Jin Liou | Digital Effects Supervisor |
| Production | Kate Spencer | Producer |
| Sound | Al Nelson | Sound Designer |
| Visual Effects | Craig Ring | Visual Effects Supervisor |
| Sound | John Powell | Original Music Composer |
| Sound | Dominic Lewis | Original Music Composer |
| Writing | Cressida Cowell | Book |
