Fringe — Episode 9 (Season 2): “Snakehead”
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This week’s episode of Fringe was fairly creepy, and the science wasn’t all that bad

The Plot: A boat from Hong Kong has run aground in the harbor and dozens of illegal Chinese immigrants have washed up on the shore, dead. It turns out it wasn’t the water or cold that killed them, but giant tentacled parasite worms lodged in their gastrointestinal tracts. The Fringe team is called in. One of the immigrants, Mai Lin, managed to survive. She tells the team that all her fellow immigrants were given a strange capsule to treat sea-sickness, but since she was raised in a fishing village and never got sea sick, she didn’t take it. The team suspects these capsules contained the larvae for the giant worms. She tearfully tells the team that her husband and daughter are on the next boat arriving in few days.
The immigrant smugglers are tied to a local Triad gang best known for smuggling and selling illegal drugs. The team initially surmises that the worms secrete some form of opiate, and this is why they’re being smuggled. After being bitten himself, Walter realizes that the worms produce a powerful immune boosting agent. Walter does some research and discovers that the worms are genetically modified Ancylostoma duodenale (hookworm), an intestinal parasite used in traditional Chinese medicine. The genetically modified versions make an immune boosting agent that is stored in their lymph glands.
Some financial documents tie a local woman to the one of the Triad’s front. She tells Agent Dunham that she has no knowledge of any illegal activity and only invested the money where her financial adviser suggested. Peter notices that her house has a surprising number of air filters and hermetically-sealed windows. Once the team learns about the immune-boosting aspect of the worm, they realize this woman knows more than she is telling. This time, Peter approaches her son who tells him that he has a rare immune deficiency. He receives a special monthly treatment of worm-powder delivered surgically, directly into his spleen.
Walter, with some reluctant help from Astrid, heads off to Chinatown to find a herbalist that sells Ancylostoma that is genetically similar to the giant worm. He finds several shops that sell the worms, and inadvertently discloses to one of the shop owners — the wrong one, of course — that he has a giant worm back at the lab. The Triad follow Astrid back to the lab, beat her up, and steal the parasite.
The ship carrying Mai Lin’s family is found and boarded, but it is too late — all the immigrants have already been carted off. Luckily, Peter is spying on the shop in Chinatown where they have been taken. He calls Agent Dunham then decides to do some investigating of his own. He breaks in to the shop and is in the process of freeing one of the immigrants when he is captured. The Triad and their crooked doctor are force feeding Peter one of the larva when the FBI team arrives, just in the nick of time. The villains are shot or captured, Peter is saved, the immigrants are taken to the hospital where they are treated, and everything ends happily.
(Oh, and Walter implanted a tracking chip in his neck.)

Overall, the science — what little there was of it — was passable this episode, so I just have a few nit-picks an observations:
1. As the Worm Turns
Nematodes such as Ancylostoma are too primitive an organism to have a lymphatic system. They don’t even have a circulatory system.
Admittedly, these are “genetically engineered” hookworms, and for a worm to grow as large as those shown, thanks to the square-cube law and other similar concepts, they would have to have some sort of circulatory system.
In the actual worms, the many-tentacled end is the tail, not the head.
2. Glad I Don’t Have to Take Them Out
Matt’s staples should have been removed long ago. He was 3 ½ weeks out from his surgery. By this far out, the incision is healed with 80-90% strength. Leaving in staples or stitches that long serves no purpose, is going to lead to train-track scarring, possible stitch abscesses, and skin-growth around the staples.
Open abdominal surgery is to be avoided whenever possible, especially in immune compromised individuals. Why not just inject the powder into the spleen?
Credit-Where-Credit-Is-Due Dept: That is where an incision for splenic surgery would be made.
3. High is Not Always Better
A high white blood count is a sign of infection (or leukemia, not the sign of a healthy immune system).
4. Ahhh, Just Right
I was starting to have concerns with Walter’s mention of “boosting the immune system” — a common alternative medicine/quackery claim. In reality, the human immune system is finely tuned: too little leaves you open for infection; too much and you get allergy problems and autoimmune disease. If all the alternative “medicine” boosted the immune system like it was claimed, we’d have an epidemic of autoimmune problems in this country. I’ll give the episode credit for having the medication be used by immune-compromised patients — a proper use.
5. What Does the FBI Teach These People?
Walter’s about as good an investigator as Olivia — that is, very bad. The logic of his whole “find a matching worm” plan had more holes than Swiss cheese (though this is Walter we’re talking about). For instance, who’s to say the various different herbalist shops didn’t all use the same importer of worms — which they probably did — so the worms from the various shops would be identical.
And Peter’s not any better. Why would he think breaking into a shop owned by the Triad — known for their brutality — would be a good idea at all?
5. Lions and Tigers and Bears, Oh My!
The song Walter was singing was “The Menagerie“, which was also mentioned in the first season (episode 16, Unleashed).

While there was some errors of scientific-concerned, most of them were minor and could be hand-waved area. Thus, for the second week in a row, there is a one-minute improvement on the Doomsday Clock.

This week’s Fringe cipher was: HIDDEN.
A list of all previous Fringe reviews is available here.
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