Emily and Nick are finally reunited with Flynn back in Boston, but the threat of Elliot's bioweapon still looms large; Emily resorts to drastic measures and makes a dangerous choice to ensure her family's safety.

Cast: Stana Katic, Patrick Heusinger, Matthew Le Nevez, Neil Jackson, Natasha Little, Christopher Colquhoun, Patrick McAuley, Paul Freeman, Agni Scott, Sara Chaanhing Kennedy, Sonita Henry, Tanya Moodie, Sophia Vassili, Ralitsa Vassileva, Donald McNair