BREEN
Neutral Culture (hostile tendency)
Description Humanoid, Bipedal
Size Medium
Skin Pigment Unknown
Hair Unknown
Distinguishing Features Wear full masks and environmental suits for survival in non-polar climates
Series Movies: VI, VII
TNG: "Hero Worship", "Interface", "The Loss"
DS9: "Indiscretion", "In Purgatory's Shadow", "By Inferno's Light", "Return to Grace", "The Loss", "For the Uniform", "Business as Usual", "The Magnificent Ferengi", "To the Death"
VOY: "Elogium", "Scorpion Part 1".  (most of these are just mentions not appearances.)
Planet of Origin Breen (non M-class, with ave. temp -53 C)
Quadrant Alpha
Background

    In 2366 two Breen warships attacked the Cardassian ship Ravinok then forced it to crash land on Dozaria where they put the Cardassian and Bajoran crew and passengers on that ship into a forced labour camp on the surface. The Breen were encased in refrigeration suits running a forced labor dilithium mine using DS9: "Indiscretion".
    A group of Breen pirates attacked the Bajoran Colony of Free Haven in 2372.  The Breen have outposts near the Black Cluster, and have settlements at Portas V near the Demilitarized Zone.  A Breen of unknown identity was replaced by a founder at some unknown date, and the "original" was imprisoned in Internment Camp 371.  This brave fellow gave his life by initating an escape from the camp in 2373, shortly after Cardassia joined the Dominion.  They eventually joined the Dominion and fought against the UFP/Klingon/Romulan alliance causing heavy losses.

Editors Notes     The Breen have evolved with a unique physiology in order to cope with this ultra-cold environment; although they breathe a fairly standard oxygen-nitrogen atmosphere at close to normal pressure, the Breen have no blood or other liquid circulatory system.  Instead, their body is permeated by millions of tiny hollow tubules, which are open to the skin.  These allow oxygen to be carried directly into the body; once there it is absorbed directly through the skin to be used by the internal organs.  A similar process carries the waste gasses back out again.  The Breen reproductive cycle is also unusual, in that they commonly produce offspring at a very early age.  Given that most known major space faring species live on class M planets with an average temperature far above that of Breen, the Breen have had to develop environmental suits of great capability and reliability in order to co-exist with others.  The average body temperature for a Breen is -38 C, and exposure to temperatures above -13 C is fatal.
     Given their nature, it is understandable that the Breen have become one of the Alpha Quadrants leading experts at creating and maintaining extremely cold environments.  They are acknowledged experts on cold storage of chemical compounds.  Casual visits to Breen worlds by non-Breen are virtually impossible.  The Breen strongly discourage visitors, and all those who do visit Breen worlds are confined to purpose-designed encampments.  Combined with the fact that the Breen habitually design environmental suits that hide their faces from view, this has given them their air of mystery.
     A Secretive, non-aligned warrior race.  Their home planet is a frozen wasteland, which means they cannot tolerate normal planetary temperatures.  Known to have cloaking and disrupter technology, thier ships have also been described as "part biologic", they are expert weapons designers, and masters of refrigeration technology.  Untrustworthy and secretive they are also one of the few humanoid races with no form of blood for gas circulation.  Thier 4-lobed brain is unreadable by telepaths.  There is a Romulan warning very appropriate: "never turn your back on a Breen."
    
The first mention of the Breen race was in the TNG episode "The Loss", where it is discovered that Betazoid telepaths have no reading from them (No appearance).  The next mention was as suspects in the destruction of the SS Vico, and were established to possess cloaking and disrupter technology.  The first actual appearance by a Breen came in ST VI: The Undiscovered Country.  In the Khitomer scenes, a Breen envoy can be seen crossing the screen in the background. (Not positively identified for another 5 years until an alien dressed similarly appeared in the DS9 episode "In Purgatory's Shadow" and was identified as a Breen.)
    The condition of the Breen homeworld was established in 2 DS9 episodes "Crossfire", "Shattered Mirror" where several quotes along the lines of "Colder than a Breen ______" were used. 
Some information provided by ST Encyclopedia


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