Severance Ms Casey Theory #severance #mscasey #severancemscaseytheorySeverance is an American science fiction psychological thriller streaming television series created by Dan Erickson and directed by Ben Stiller and Aoife McArdle. It stars Adam Scott, Zach Cherry, Britt Lower, Tramell Tillman, Jen Tullock, Dichen Lachman, Michael Chernus, John Turturro, Christopher Walken, and Patricia Arquette. The plot follows Mark (Scott), an employee of Lumon Industries who agrees to a "severance" program in which his non-work memories are separated from his work memories. The series premiered on Apple TV+ on February 18, 2022, to universal acclaim from critics, who praised its story and performances.