04/25/2011 (09:00PM - 10:\00PM) (Monday) : TRAITORS AT THE HIGHEST LEVEL -- ROGER BART GUEST STARS -- The White House is rocked by the sudden illness of one of their own, leaving Chief of Staff Peel (guest star Roger Bart, "Desperate Housewives") and Sterling (Željko Ivanek) to investigate possible conspirators. Michael Buchanan (Scott Patterson) comes to the aid of Leila (Sarah Roemer), but it leaves them both at risk of Sophia's wrath. Across the globe in Russia, Sean (Jason Ritter) and Vicky (Taylor Cole) race to stop Sophia's weapon from being loaded onto a plane heading to the United States. Blair Underwood, Ian Anthony Dale, Bill Smitrovich, and Lisa Vidal also star.
Source: NBC Entertainment
This post was updated April 29, 2011.