Three entries, different jobs
The Demon Slayer collection separates the 2019 television series, the Mugen Train film and Infinity Castle. The poster and release year help identify which production you opened. A film title should not be treated as a television season number.
Use the guide for the episode you remember
Search the series name, then open its episode guide. Different viewing services may group arcs differently, so compare episode names as well as numbers. A saved checkpoint records the numbered chapter used in this catalog.
Subbed or dubbed?
Check the selected viewing edition’s audio and subtitle choices. Japanese original-language metadata does not tell you every dub available on another service. Preview dialogue and on-screen writing before deciding that the chosen subtitle track covers everything you need.
Continue with another anime
For a different story after Demon Slayer, explore An Anime Evening. The collection mixes films and series so you can choose between one sitting and a longer run. Availability of a particular dub or season still depends on your country and viewing option.