According to Aaron Moten, who plays Brotherhood of Steel hopeful Maximus in the Fallout TV series, the show is planned to run until Season 5 or Season 6. Speaking at Comic Con Liverpool, Moten revealed that the showrunners had set an endpoint when he signed on, and this endpoint remains unchanged. He emphasized that the development of the characters would be a gradual process over these seasons.
The success of the show, particularly the explosive popularity of Season 1 and the high interest in Season 2, suggests a strong possibility of reaching the planned endpoint. Filming for Season 2 has recently wrapped, with actors Walton Goggins and Ella Purnell celebrating the milestone on social media.
Warning! Potential spoilers for the Fallout TV show follow.