When Isobel is present when a bomb goes off and a boy she knows is critically injured so she demands an all out effort to find the bomber. Initially they receive word that the bomber is an anarchist. But a further investigation that someone on the web is looking for people willing to do it. They eventually find this person and learn she is a Russian spy Who is planning another attack. They go to the State Department who tells them to tread softly cause they're in the midst of negotiating the release of an American being held by the Russians. But when the boy dies Isobel becomes more determined to get her. Maggie's is still reeling from her friend's death and trying to care for her daughter.
