A group of four teenage girls are suspected of having an STD when they are hospitalized for seizures. However, the NIH team must uncover the true cause of the seizures, and a pair of pants holds a clue.

When a couple of Iraqi War vets start showing signs of Gulf War Syndrome, the NIH team is called to investigate. However, when a group of Nursing-home residents fall ill with the same symptoms, the NIH team is left baffled. However, they are missing the bigger picture, where a lector holds an important clue.