Welcome to the underworld of The U.S. Defense against Homeland Terrorism. The Assignment: Caitlin meets a pair of sexy detectives and finds her once secure life turned on its head. The Agent: Agent Jackson Cook doesn't know who he is anymore, but a hot reporter is getting ready to ruin all three of his names. The Assassin: Dan Simmons has met the woman of his dreams, now all he has to do is convince her that killing comes with a great 410K. The Informant: A tragedy carries Catriona to Scotland where she comes face to face with a ghost. When danger is undercover, sometimes your friends are your enemies, and strangers are your only friends.