The TARDIS arrives on the planet Terra Alpha, where the Seventh Doctor and Ace discover a society in which sadness is against the law - a law enforced zealously by the brightly uniformed Happiness Patrol. The planet is ruled by Helen A with the aid of her companion, Joseph C, and her carnivorous pet Stigorax, Fifi.
Unfortunately the movie Doctor Who: The Happiness Patrol is not yet available on Disney Plus.
| Directing | Chris Clough | Director |
| Writing | Graeme Curry | Writer |
| Writing | Andrew Cartmel | Script Editor |
| Production | John Nathan-Turner | Producer |
| Editing | Hugh Parson | Editor |
| Visual Effects | Perry Brahan | Visual Effects Designer |
| Visual Effects | Dave Chapman | Visual Effects |
| Costume & Make-Up | Richard Croft | Costume Design |
| Camera | Geoff Clark | Camera Supervisor |
| Camera | Alec Wheal | Camera Supervisor |
| Sound | Dominic Glynn | Original Music Composer |
| Art | John Asbridge | Production Design |
| Art | Oliver Elmes | Graphic Designer |
| Sound | Keff McCulloch | Theme Song Performance |
| Costume & Make-Up | Dorka Nieradzik | Makeup Artist |
| Production | Jane Wellesley | Production Assistant |
| Production | June Collins | Production Assistant |
| Production | Gary Downie | Production Manager |
| Crew | Dick Mills | Special Sound Effects |
| Lighting | Don Babbage | Lighting Director |
| Sound | Trevor Webster | Sound |
| Sound | Scott Talbott | Sound |
