Glass is a superhero thriller film and the final installment in M. Night Shyamalan's Eastrail 177 Trilogy, following Unbreakable and Split. Sarah Paulson plays Dr. Ellie Staple, a psychiatrist specializing in patients who believe they have superhuman abilities. Her character becomes a central figure in the film, as she tries to convince the main characters that their powers are merely delusions. Paulson's performance in Glass is intense and captivating, adding an intriguing layer to the superhero narrative.