The third STAR TREK series concerns Benjamin Sisko, commander of the starship Deep Space Nine, who discovers the first known stable wormhole - a virtual shortcut through space that leads to the Alpha Quadrant to the Gamma Quadrant on the other side of the galaxy. The Gamma Quadrant is governed by the Dominion, a group led by the Changelings - an group of shapeshifters which counts DS9 crew member Odo (Rene Auberjonois) among its numbers. The Dominion has become a violent force in the galaxy, and the Deep Space Nine and its crew has become the only home in upholding the way of life established by the Federation.

Episode Listing:
The Search Part I
The Search Part II
The House of Quark
Equilibrium
Second Skin
The Abandon
Civil Defense
Meridian
Defiant
Fascination
Past Tense Part I
Past Tense Part II
Life Support
Heart of Stone
Destiny
Prophet Motive
Visionary
Distant Voices
Through the Looking Glass
Improbable Cause
The Die is Cast
Explorers
Family Business
Shakaar
Facets
The Adversary