Erica learns her partner, Malik, is a Visitor and must fight for her life - literally - to stop Anna from finding out she's Fifth Column. Meanwhile, Anna learns that Malik is missing and orders Ryan to find her, while Lisa realizes her body is beginning to change, causing her to become more and more like her mother.

Cast: Elizabeth Mitchell, Morris Chestnut, Joel Gretsch, Logan Huffman, Laura Vandervoort, Morena Baccarin, Scott Wolf, Charles Mesure, Rekha Sharma, Jane Badler, Michael Patric, Christopher Rosamond