Fringe: Season 2, Episode 9

2 - 9: Snakehead

A damaged cargo ship washes ashore and all of the crew members seem to be infected with squid-like creatures that turn out to be gigantic parasitic worms. The worms are said to be a modified version of Ancylostoma duodenale. While Fringe Division investigates, the clock starts ticking when Olivia, Peter and Broyles discover a terrifying connection between the incident and a threatening organization.