Sydney (Jennifer Garner) returns to America with her ex-lover and fellow SD-6 agent Noah (Peter Berg), who offers her a way out of the spy game once and for all. But Sydney has to take care of unfinished business: Now convinced that her mother, KGB agent Irina Derevko, is still alive, she will not rest until she finds the woman. Meanwhile, Vaughn (Michael Vartan) puts a tail on an assassin known as "The Snowman" in hopes of tracking down the elusive Khasinau, who may or may not be "The Man" behind all the skullduggery occurring in previous episodes. ~ Hal Erickson, Rovi