In a series of escalating encounters, former security guard David Dunn uses his supernatural abilities to track Kevin Wendell Crumb, a disturbed man who has twenty-four personalities. Meanwhile, the shadowy presence of Elijah Price emerges as an orchestrator who holds secrets critical to both men.

James McAvoyas Patricia / Dennis / Hedwig / The Beast / Barry / Heinrich / Jade / Ian / Mary Reynolds / Norma / Jalin / Kat / B.T. / Kevin Wendell Crumb / Mr. Pritchard / Felida / Luke / Goddard / Samuel / Polly
Bruce Willisas David Dunn / The Overseer
Samuel L. Jacksonas Elijah Price / Mr. Glass
Sarah Paulsonas Dr. Ellie Staple
Anya Taylor-Joyas Casey Cooke
Spencer Treat Clarkas Joseph Dunn
Charlayne Woodardas Mrs. Price
Luke Kirbyas Pierce
Adam David Thompsonas Daryl
M. Night Shyamalanas Jai, Security Guard
Mike Gioulakis