Agents Mulder and Scully find themselves under strict quarantine after coming into contact with Cassandra Spender. Meanwhile, the suspicious Diana Fowley increases her loyalties to the Cigarette Smoking Man.



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Episode cast overview, first billed only:
Don S. Williams ...
Elder #1
Elder #4
Elder #5


Cassandra Spender is taken back by the consortium. Mulder learns the truth of the conspiracy from Marita Covarrubias who has been used as a test subject for the alien vaccine. Scully suspects Diana Fowley is in league with the Cigarette Smoking Man, but Mulder doesn't believe it. The consortium agrees to hand over Cassandra to the aliens to begin colonization. Written by Muldernscully

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Release Date:

14 February 1999 (USA)  »

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Aspect Ratio:

1.78 : 1
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Did You Know?


Little girls in masks played the aliens. See more »


As Mulder is walking to Fowley's apartment door, a crew member can be seen adjusting a hallway lamp behind him. See more »


FBI Deputy Director Alvin Kersh: Agent Scully, make some sense.
Dana Scully: Sir, I wouldn't bet against him.
See more »

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User Reviews

So long, Syndicate!
9 February 2007 | by (Roy, Utah) – See all my reviews

When trying to make things more serious and dark for mythology episodes, the x-files turns into a nighttime series, meaning most of the scenes are shot at night. And most of the shots indoors are done with extremely low lighting. Being in L.A., this is what has to be done. But it's done well and it's very effective. One Son is the second part of a revealing mythology story arc. Cassandra Spender is the first successful alien/human hybrid and the Syndicate is going to turn her over to the aliens so that colonization can begin. Mulder and Scully are trying to prevent this. Scully senses that Diana Fowley isn't working on their side and tries to prove it to Mulder. But Mulder is blind to anything regarding Diana. It's amazing to see him treat Scully with such contempt in relation to Fowley. Mulder has blind faith in her. I liked the set used for the air force base hangar. Maybe it's a real one. I don't know, but it looks quite authentic. It's shocking to see all of the Syndicate get slaughtered by the alien rebels. You're thinking, "what now for the conspiracy?" But with CSM and Krycek still alive you know that lies are still going to be abundant. From time to time, Mulder speaks in riddles when questioned by higher authorities. He does it at the end of this episode with Kersh, which frustrates Kersh to no end. I enjoy it. It's great to finally get the answers, but true to the X- Files, once one question is answered, they throw in some new wrinkles that begets new questions for us to ponder.

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