To watch the Unbreakable trilogy in order, there are a few options. The most common order is to watch the movies in release date order, which is Unbreakable (2000), Split (2016), and Glass (2019) . Another option is to watch the movies in chronological order, which would be Split, Unbreakable, and then Glass. However, it is generally recommended to watch the movies in release date order to fully appreciate the connections between them and the subtle references to previous films.