Demon Slayer: Infinity Castle is finally heading to cinemas on September 12, 2025, and many are wondering what to watch before the movie. Infinity Castle marks the beginning of the series’ final two arcs, so there is a lot to catch up on.

Here’s everything you need to watch to understand the story before heading into theaters this weekend.

Everything to watch or recap before Demon Slayer: Infinity Castle movie

Created by Koyoharu Gotouge, Demon Slayer follows the story of Tanjiro Kamado. His life turns tragic when his entire family, except his sister Nezuko, is killed by a demon. However, following the attack, Nezuko is turned into a demon. He sets out on a journey to cure her and joins the Demon Slayer Corps, an organization dedicated to eradicating demons.

The penultimate arc of Demon Slayer is hitting theaters on September 12, 2025. So, viewers who haven’t seen the anime or read the manga can watch the following.

Mugen Train Arc: It is one of the most crucial arcs in the series. The arc sets the story for the subsequent ones. There are both theatrical and series versions, but viewers who are short of time can stick to the movie. It covers all the main plot points, including introducing Rengoku, a Hashira, and Akaza, an Upper Rank demon.

Swordsmith Village Arc: Demon Slayer Season 3 covers the Swordsmith Village Arc. In the season’s first episode, “Someone’s Dream”, all of the Upper Rank demons gather for a meeting in Infinity Castle. It introduces some of the major villains that will appear in Infinity Castle, including Muzan Kibutsuji, the main villain of the series. Watching this episode is good enough to learn about the villains that the Demon Slayer Corps will face.

To the Hashira Training Arc: In Season 4, which covers the To the Hashira Training Arc, introduces viewers to all nine Hashira. While the entire season focuses on the Corps’ members’ training, the final episode, “The Hashira Unite”, is the most important one. It pits all the Hasira against Muzan at the Ubuyashiki mansion and connects directly to the movie.

Demon Slayer: Infinity Castle is the first movie in a trilogy that adapts the final part of the manga.