At Deep Space Nine, a space station located next to a wormhole in the vicinity of the liberated planet of Bajor, Commander Sisko and crew welcome alien visitors, root out evildoers and solve all types of unexpected problems that come their way.
The Provisional Government of Bajor invites Starfleet to help them rebuild after the Cardassian Occupation. Commander Benjamin Sisko is selected to take command of their space station, formerly known as Terok Nor that is then designated by Starfleet as Deep Space 9. As part of the agreement between the Federation and Bajor, Starfleet will help them to become a member of the Federation.
Season 2
26 episodes Sep 1993 – Jun 1994
In their second year together, the crew of Deep Space 9 face problems that will affect the galaxy forever. A Bajoran extremist group attempts to force the Federation out of the Bajoran system. The Cardassians are secretly supplying them with weapons, hoping to return to reclaim the planet and hold the Bajoran wormhole for the Cardassian Union. However, the greatest enemy of all is lurking beyond it.
Season 3
26 episodes Sep 1994 – Jun 1995
Season 3 of Deep Space Nine marks a turning point for the series, as it introduces the USS Defiant, a powerful starship that allows the crew to explore the Gamma Quadrant and face the threat of the Dominion, a vast and ruthless empire ruled by the shape-shifting Founders.
Season 4
25 episodes Oct 1995 – Jun 1996
Season 4 of Deep Space Nine marks a major shift for the series, as it introduces a new conflict between the Federation and the Klingon Empire, sparked by the latter's distrust of the shape-shifting Founders. Worf, the former security chief of the USS Enterprise-D, joins the station's crew as Sisko's strategic operations officer, and faces challenges in his loyalty, honor, and family.
Season 5
26 episodes Sep 1996 – Jun 1997
Season 5 of Deep Space Nine begins the Dominion War arc that will dominate the rest of the show. The Federation and its allies face a new enemy in the form of the Cardassian-Dominion alliance, which threatens to conquer the Alpha Quadrant.
Season 6
26 episodes Sep 1997 – Jun 1998
Season 6 of Deep Space Nine marks the height of the Dominion War arc, as it depicts the Federation and its allies in a desperate struggle against the Cardassian-Dominion alliance, which has occupied Deep Space Nine and the Bajoran system.
Season 7
26 episodes Sep 1998 – Jun 1999
Season 7 of Deep Space Nine marks the end of the series, as it concludes the Dominion War arc and the saga of the characters and their relationships. The Federation and its allies face the final showdown with the Cardassian-Dominion alliance, which is aided by the Breen. Sisko and his crew must also deal with the threat of the pah-wraiths, the evil counterparts of the Prophets, who are unleashed by Kai Winn and Dukat.
