Willy Fog is again challenged by Sullivan and embark, with his friends, in search of a secret path to the center of the Earth, dodging powerful streams and strange animals.
Unfortunately the movie Willy Fog in Journey to the Center of the Earth is not yet available on HBO Max.
| Writing | Jules Verne | Novel |
| Writing | Rafael Soler | Adaptation |
| Sound | Guido De Angelis | Original Music Composer |
| Sound | Maurizio De Angelis | Original Music Composer |
| Production | Olga Pla | Production Assistant |
| Production | Cristina Nicolau | Production Coordinator |
| Production | Ray Hampson | Production Coordinator |
| Crew | Claudio Biern Lliviria | Post Production Supervisor |
| Production | Olivia Borricón | Production Supervisor |
| Production | José Manuel Iglesias | Associate Producer |
| Editing | Esteban Llorens | Editor |
| Editing | Lola Serrano | Assistant Editor |
| Editing | Iván Rodríguez | Assistant Editor |
| Art | Fernando Herraiz | Storyboard Artist |
| Art | Francisco Díaz Rojo | Storyboard Artist |
| Art | Jordi Guasch | Storyboard Artist |
| Art | Toni García | Storyboard Artist |
| Production | Manolo Castilla | Production Manager |
| Sound | David Richmond | Sound Effects |
| Sound | Toni Moliné | Sound Mixer |
| Visual Effects | Dani Tezanos | Animation Supervisor |
| Writing | Claudio Biern Boyd | Original Concept |
| Writing | Claudio Biern Boyd | Characters |
| Directing | Wang Yaquan | Director |
