The actress will play Theresa Burke, who's married to star Matt Dillon's character, Secret Service agent Ethan. Formerly an agent herself, Theresa left to stay home with their son, Ben.
She's described as an intelligent, independent and charismatic person. While her relationship to Ethan has been strong, his flaws are beginning to test her patience.
Sossamon is best known for her big screen roles in "A Knight's Tale," "40 Days and 40 Nights," and "Rules of Attraction." She just finished shooting on "The Jesuit" from writer Paul Schrader and director Alfonso Pineda Ulloa.
Aside from Dillon, she joins already announced cast members Terrence Howard, Carla Gugino, Toby Jones and Melissa Leo on "Wayward Pines," which is based on Blake Crouch's novel series of the same the name.
She is represented by APA and Oren Segal at Radius Entertainment.