In the continued investigation of the "Iraq War Syndrome," David (Peter Outerbridge) checks out a theory that the water purification system has malfunctioned. In Mexico, Jill (Sarah Strange) and Carlos (Conrad Pla) make a connection between a hybrid plant designed to detect land mines and the hemophilia epidemic. When that theory fails, David joins them in Mexico and explores the possibility that mosquitoes bred to eliminate malaria might be responsible. Bob (Dmitry Chepovetsky) quits NorBAC to pursue his love of perfume creation. Caroline (Maxim Roy) receives the diagnosis she's been waiting for.