Fringe: Snakehead

"Snakehead" is the ninth episode of the second season of the American science fiction drama television series Fringe. The episode followed the Fringe team's investigation into horrible deaths caused by large parasitic worms erupting from their victims' mouths. The case soon leads them to a Chinese gang and a black market of immunodeficiency medicinal drugs. Co-executive producer David Wilcox wrote the episode, while Paul Holahan served as its director. Andrew Orloff, the episode's visual effects supervisor, strived to makes the parasitic worms look as real as possible with the help of the actors and camera angles. It featured one-time guest stars Tzi Ma, Colby Paul, Ingrid Torrance and Jack Yang. "Snakehead" first aired on December 3, 2009 to an estimated 6.94 million viewers in the United States. Reviews of the episode were generally negative, as multiple critics expressed their dissatisfaction that little was learned about the series' overall mythology.