Arnold Schwarzenegger's son, actor Patrick Schwarzenegger, has reportedly joined the cast of series 'The Terminal List', which also stars his brother-in-law Chris Pratt. The conspiracy-thriller will also feature Constance Wu, Jeanne Tripplehorn, Taylor Kitsch and Elvis Presley's granddaughter Riley Keough in pivotal roles. 'The Terminal List' is based on Jack Carr's novel of the same name.