According to Aaron Moten, who plays Maximus in the Fallout TV series, the show is planned to run until Season 5 or Season 6. Speaking at Comic Con Liverpool, Moten shared that when he signed on for the series, the showrunners provided him with both a starting point and an endpoint, which remains unchanged at Season 5 or 6. He emphasized that the development of the characters would be a gradual process throughout the series.
The success of the show, particularly after the explosive popularity of Season 1 and the high interest in Season 2, suggests a strong possibility of reaching this planned endpoint. Filming for Season 2 has recently wrapped, as celebrated by Walton Goggins, who plays The Ghoul, and Ella Purnell, who portrays Lucy, through social media posts.
Whether the Fallout TV series will indeed last for 5 or 6 seasons depends on its continued success and viewer engagement. Given the enthusiastic response to the first season and the anticipation for the second, the show seems well-positioned to achieve its intended run.