The third Star Trek series is led by Benjamin Sisko commander of the space station Deep Space Nine who discovers the first known stable wormhole a virtual shortcut through space that leads from 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 Deep Space Nine and its crew has become the only home in upholding the way of life established by the Federation. Episodes comprise: 1. Emissary - Part 1 2. Emissary - Part 2 3. A Man Alone 4. Past Prologue 5. Babel 6. Captive Pursuit 7. Q-Less 8. Dax 9. The Passenger 10. Move Along Home 11. The Nagus 12. Vortex 13. Battle Lines 14. The Storyteller 15. Progress 16. If Wishes were Horses 17. The Forsaken 18. Dramatis Personae 19. Duet 20. In the Hands of Prophets