The Auton Trilogy was a series of three direct-to-video films produced by BBV Productions. They featured UNIT fighting against the Nestene and the Autons and were officially licensed by Robert Holmes.
For April Fools' Day in 2022, BBV jokingly announced a spurious fourth film in the series, Auton 4: Nestene Revelations, which, judging by the cover, would also have featured Giles, a Krynoid, and a mustachioed Cyberon called "Cyber Ron".[1]
For the purposes of this list, an "Auton story" is one in which one living, authentic Auton plays a part within the confines of the story, outside of flashbacks to previous stories and cliffhangers that lead into the following story. For this reason, stories such as Love & Monsters are absent due to the Autons' only contribution being references to past Auton stories.