Fireman Sam Theatrical Universe

The Fireman Sam Theatrical Universe is a film franchise of the British-Welsh CGI series of Fireman Sam. This is where 60-minute theatrical films of Fireman Sam would be produced and released. In some countries, it is also known as the Fireman Sam Cinematic Universe. It's first film in the Fireman Sam Theatrical Universe is Fireman Sam: Alien Alert.

Unoffical in the Franchise
Fireman Sam: The Great Fire of Pontypandy (2010)

Fireman Sam: Heroes of the Storm (2015)

Official in the Franchise
Fireman Sam: Alien Alert (2017)

Fireman Sam: An Incredible Discovery(2018)

Fireman Sam and the Newtown Treasure Hunt (2018)

Fireman Sam: Journey to the Newtown Peak (2018)

Fireman Sam: Invasion of the Humanoids (2018)

Fireman Sam: Revenge of the Alien Space Pirates (2018)

The Fireman Sam Movie (2018)

Trivia
According to most Fireman Sam fans, Fireman Sam: The Great Fire of Pontypandy and Fireman Sam: Heroes of the Storm does not count as films in the Fireman Sam Theatrical Universe due to them being direct-to-DVD releases, despite them having limited theatrical releases.

Buck Douglas appears in all of the films in this franchise, except for The Great Fire of Pontypandy and Heroes of the Storm, which are made before his introduction.

Hector Dermont appears in all the films in the franchise except for The Great Fire of Pontypandy, Heroes of the Storm, and Alien Alert, which are made before his introduction.

The films in the franchise are darker and longer than the regular Fireman Sam franchise, thus attracting an older audience.

Most of the upcoming films in the franchise starting with Alien Alert are about aliens and space, except for The Newtown Treasure Hunt, which is about pirates and treasure hunting and The Fireman Sam Movie, which is about the characters attending a music game show.