Episode Detail: Outbreak - Threshold
Molly fears there will be an alien outbreak in Washington, D.C., after a teen suddenly dies from eating infected food. Her team rushes to discover what foods may be tainted by the aliens and their place of origin. To help with the investigation, Molly brings in a respected botanist. Meanwhile, Fenway tries to find a way to save Lucas's life and keep him from mutating. Later, Molly is shocked when Manning contacts her and tells her the reason why the aliens want to take over the Earth.