Crazy Battlestar Galactica Theory #1: The Cylon Sex Disease (STD)
April 11th, 2007

Okay. I touched on this theory in an earlier post when I was flailing for an explanation of why Tigh heard the music in the first half of the Season 3 finale.
I was pretty much joking, but I think this theory has some merit. Bear with me. It’s completely ridiculous, but hey, what else are we to do until Season 4 except wildly speculate?
The Purpose of a Cylon STD
- Make the Final Five Cylons receptive to the “song” message delivered in the Season Three Finale.
- The disease is used for monitoring purposes (how did Baltar know Tigh killed Ellen?).
- The disease contains dormant programming for the Final Five that would be activated at a later date, perhaps upon hearing the song.
Why Use A Cylon STD?
- Computers have viruses, and so do humans. A cross species virus can be an efficient and covert delivery mechanism. Because the final five were unknown but known to be living among humans, how would the other seven Cylons contact them? The viral program may be designed to infect humans and Cylons alike, but only serving a purpose in the Cylon hosts.
- Maybe the Cylon STD is sent out by the other seven Cylons in an attempt to locate and take control of the Final Five. In Season Four, the Final Five will realize they have been infected and turn to the humans to cure them.
- Cross species diseases and STDs could allow the show to tackle some contemporary issues like bird flu and computer viruses.
- Viruses have appeared on the show in previous episodes as plot devices. Cylons tried to hack into Galactica, and a “beacon” infected with a virus landed aboard a Cylon base star.
Tracing the Spread of the Infection
Tracing the infection is just a matter of following who slept with who among the crew of the Galactica. The biggest evidence for a Cylon sex disease is that all Four of the Final Five Cylons either slept with Cylons or have links to people (carriers) who slept with known Cylons.
The Final Four Cylons
The four Cylon models revealed in the Season 3 Finale were Anders, Tori, Saul Tigh, and Tyrol (Chief). Let’s deal with them on a case by case basis to see how they could have been infected by a Cylon sex disease.
Anders and Tori
- Six slept with Baltar way back in the miniseries.
- Baltar slept with Starbuck in the episode Kobol’s Last Gleaming Part 1.
- Or: Leoben slept with Starbuck (while on New Caprica [Occupation])
- Starbuck slept with Anders (The Farm).
- Anders was revealed to be sleeping with Tori in the Season 3 finale (Crossroads Part II).
Saul Tigh
- In Occupation, Ellen Tigh sleeps with the Brother Cavil Cylon.
- Ellen Tigh sleeps with Saul Tigh.
Tyrol (Chief)
- Tyrol slept with Sharon early in the series before she was revealed to be a Cylon.
There are obviously some collateral individuals who may not be infected with the disease despite having sexual relations, which is entirely possible since they haven’t been identified as necessary carriers between the above individuals:
- Helo (slept with Sharon)
- Lee Adama (slept with Starbuck)
- Callie (slept with Chief)
Note also by omission the few individuals that aren’t known to have had sex with Cylons (or anyone, for that matter) who have shown a remarkable steely confidence throughout the show so far:
- Commander Adama
- Roslyn
- Gaeta
- Doc Cottle
- Zarek
- Dualla (although she may be infected if Lee Adama is)
(I hope they keep pure. The human race depends on it.)
The Fifth “Final Five” Cylon?
Based on this Cylon STD theory, I personally think Starbuck is the fifth Cylon.
If Starbuck is a Cylon, the sex disease is seen to have spread mostly from Cylon to Cylon and needing only one human carrier:
Starbuck -> Anders -> Tory
Sharon -> Tyrol
Cavil -> Ellen -> Tigh
Who knows, maybe Tigh was injected with the virus while in captivity, removing the need for Ellen as a carrier. Then maybe we can forget the whole cross-species aspect of the Cylon STD, making it even more believable.
Conclusion
Personally, I see the Cylon sex disease as a great way to pay homage to original series Star Trek. I always wondered how Kirk, Spock, McCoy, and other crew members could have numerous horizontal intergalactic alien interfaces and not come down with a case of sexually transmitted space cooties. Meanwhile, there were tons of galactic bugs going around: the aging virus (The Deadly Years), diseases that only affect grown ups (Miri), to the sweat transmittable disease Psi-2000 virus that caused Sulu run around shirtless with a fencing sword (The Naked Time). Not having an STD on original Star Trek (too sensitive an issue for the sixties?) was a real missed opportunity and could be rectified by Battlestar Galactica.
Plus, if Cylon sex disease eventually leads to topless Galactica crew members with fencing swords, I’m all for it.