The Enemy Within 1x03 "The Ambassador's Wife" Season 1 Episode 3 Promo - Following the discovery that a U.S. ambassador is selling classified intelligence to a Colombian cartel, Shepherd (Jennifer Carpenter) devises a plan to catch him that will push Keaton's (Morris Chestnut) moral code to the brink. Keaton brings a new member (Cassandra Freeman) on to the team.