Archer, Reed and Sato are transformed to aliens while visiting a planet.



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Alien Decon Agent


Archer, T'Pol, Sato and Reed land on a planet to investigate a Xindi landing craft, seemingly abandoned two weeks ago, and are infected with a virus that changes their DNA and urges them to return to their capital city. A ship of exterminators seeks to kill the infected crew to prevent an outbreak. Written by Meribor

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Release Date:

24 September 2003 (USA)  »

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Did You Know?


Ensign Mayweather has a brief period as ranking bridge officer on board Enterprise when all his seniors are off the ship. See more »


When Trip tries to persuade T'Pol to come back to Enterprise with him, she refuses, saying she'd rather stay with Archer and Hoshi, but T'Pol is completely out of contact with Enterprise while she follows her two crewmates. Why doesn't she take a communicator and phaser from Trip so that she's at least able to communicate with Enterprise and defend herself? See more »


Tret: Your ship is in restricted space.
Commander Charles 'Trip' Tucker III: Sorry. It wasn't very well marked.
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Archer's Theme [Enterprise - Music from the Original Television Soundtrack]
Written by Dennis McCarthy
Performed by Dennis McCarthy
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User Reviews

They did this sort of thing on "Star Trek: Voyager"
29 March 2015 | by (Bradenton, Florida) – See all my reviews

On "Star Trek: Voyager" there was an episode in which two of the crew members devolve into amphibian creatures (Janeway and Chakotay, I think). Here in "Extinction", the same idea is recycled--which is a shame as the previous several episodes were marked improvements in the series.

T'Pol, Hoshi, Archer and Reed land on some crappy planet. Just about immediately, they start changing into primordial creatures. With T'Pol the changes aren't as obvious. But with the other three they look and act and look a lot like characters from "The Flintstones"--all animal-like and creepy. This calls for the cast to act (or, shall I say over-act) like odd sorts of thingies. As for me, I grew tired of all this nonsense very quickly and I had to fight the urge to just go on to the next episode.

Soon after they are infected, some aliens arrive and announce that the planet is quarantined and Enterprise won't be allowed to take the infected crew members out of orbit. It DOES make sense, as apparently the virus on the planet turns folks into members of a long deceased and goofy species that inhabited the place and built cities.

So is it any good? Well, apart from being a retread of sorts AND featuring some goofy acting, the story idea isn't terrible. Hardly a glowing endorsement, I know.

By the way, SOME of the graphics for the city (particularly the one the infected folks picture in their mind) are really poor. I know it was filmed a while back when CGI was much less refined, but this was ridiculously bad even for then.

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