Antonio's ex-wife's sister is kidnapped. The team wonders if she was taken by a bitter victim of his ex-wife, who is a successful District Attorney or if it was done randomnly. A later attack blows the case wide open.

A biophysicist disappears along with the only sample of a deadly virus she created. To complicate things, she claimed to have been followed by men in black suits; leading the team to wonder if the government was really survelling her or if she was going crazy.