S1, E2: Dr. Hastings develops a vaccine that is one hundred percent effective against all forms of biological warfare. His lab is destroyed by fire and he gives his dog over to Dan, Tess, and Daisy to take care of. He is kidnapped by a foreign agent, the janitor, but is daringly rescued by Dan and Tess. After their harrowing aircraft landing we realize the importance of the dog. The last remaining vaccine sample is flowing in her blood.