Watch the trailer for Glass, M Night Shyamalan's new psychological thriller

Universal Pictures has released the new trailer for M Night Shyamalan's follow-up film to psychological thrillers Split and Unbreakable. Glass will complete the trilogy.

While there was only hints at the end of the films, Shyamalan confirmed at the San Diego Comic-Con they do indeed all connect.

Glass follows the story of a psychiatrist, played by Sarah Paulson, and three people who believe they have superhero powers but actually suffer from dissociative identity disorders.

All protagonists from the previous films appear, including James McAvoy's character from Split, Kevin Wendell Crumb, Bruce Willis's Unbreakable character, David Dunn, and the new Mr Glass, played by Samuel L Jackson.

All three characters come together for the third film in a hospital under supervision for treatment, with a main focus on Jackson's character.

Patricia, one of McAvoy's personalities, also appears in the film, due to be released on January 18, 2019.