EXCLUSIVE: Law & Order: Criminal Intent alum Jamey Sheridan, who recurred as Vice President William Walden on the first season of Showtime’s acclaimed new drama Homeland, has been upped to regular for Season 2. In season 1, Vice President Walden survived an assassination attempt and offered Nicholas Brody (Damian Lewis) to run for the U.S. House of Representatives as he himself is priming for a Presidential run. In addition to his gig on Homeland, Sheridan, repped by ICM and Brillstein Entertainment, was recently cast as guest star (and potential recurring) in the CW pilot Arrow, playing Robert Queen, Olive Queen/Green Arrow’s (Stephen Amell) father.