In his first series role in 40 years, Jon Voight has signed on for the upcoming seventh season of "24." On the Emmy-winning Fox drama, Voight will play Jack Bauer's (Kiefer Sutherland) uber-nemesis who is pulling the strings behind next season's terrorist threat. The character will be introduced during "24's" two-hour Season 7 prequel and will be featured heavily in the latter half of the season.