A blue cat named Buxton is found in the Magic Garden. With help from the Blue voice (played by Fenella Fielding), Buxton enters the ruins of the old treacle factory where he is crowned king after correctly identifying the colours of seven doors (coloured different shades of blue). Buxton throws all the characters of The Magic Roundabout except Dougal into prison and steals Zebedee's magic moustach
Unfortunately the movie Dougal and the Blue Cat is not yet available on HBO Max.
| Directing | Serge Danot | Director |
| Writing | Jean-François Josselin | Dialogue |
| Camera | C. Giresse | Camera Operator |
| Art | J.P. Garreau | Decorator |
| Directing | Serge Danot | Stage Director |
| Visual Effects | Jean-Marc Cahier | Animation |
| Art | J.P. Liblanc | Decorator |
| Sound | Joss Baselli | Original Music Composer |
| Production | J. Auclin | Production Director |
| Sound | E. Croix | Sound Designer |
| Writing | Eric Thompson | Author |
| Crew | J. Duval | Mix Technician |
| Directing | Claude Levet | Assistant Director |
| Visual Effects | Claude Levet | Animation |
| Production | L. Danot | Production Director |
| Sound | J. Duval | Sound Recordist |
| Editing | Claude Levet | Assistant Editor |
| Writing | Jean-François Josselin | Writer |
| Writing | Serge Danot | Story |
| Production | L. Auclin | Producer |
| Production | L. Danot | Producer |
| Writing | Martine Danot | Characters |
