S1, E8: President Martinez (Blair Underwood), furious about recent security failures, demands answers from Director of National Intelligence, Blake Sterling (Zeljko Ivanek). When he doesn't receive the progress that he desires, Martinez decides to personally interrogate Michael Buchanan (Scott Patterson) about his involvement in the assassination attempt. While Michael holds to his claim that he doesn't know who is involved, he inadvertently reveals incriminating evidence about someone deep inside the President's staff. Meanwhile, Dempsey (Guest Star Hal Holbrook) dispatches Vicky (Taylor Cole) on a new clandestine mission. And, elsewhere, Sean (Jason Ritter) and Leila (Sarah Roemer) scramble to stay ahead of the covert ops that are trying to silence them and what they know. Laura Innes, Ian Anthony Dale, Bill Smitrovich and Lisa Vidal also star.