
Star Trek: Deep Space Nine — Season 4
At the edge of the Final Frontier, the Universe's greatest mystery is about to unfold.
About this season
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.
Episodes (25)

1. The Way of the Warrior
7.9Aired 2 October 1995 • 90 min
Stardate: 49011.4. When the Klingons bring a task force to DS9, Captain Sisko sends for Starfleet's lone Klingon officer, Worf, to uncover the mysterious intentions of their presence.

2. The Visitor
7.8Aired 9 October 1995 • 45 min
Stardate: Unknown. Melanie, an aspiring writer, wants to know why Jake Sisko stopped writing at 40. Jake tells how his father died in an accident and then suddenly reappeared.

3. Hippocratic Oath
7.3Aired 16 October 1995 • 45 min
Stardate: 49066.5. Bashir is asked to help a group of renegade Jem'Hadar break their addiction to ketracel white. Meanwhile Worf is dissatisfied with the way Odo runs security.

4. Indiscretion
7.4Aired 23 October 1995 • 45 min
Stardate: Unknown. Kira and Gul Dukat go after the lost prison ship Ravinok. Dukat has a secret. Meanwhile Kasidy Yates tries to find work near Bajor, leaving Sisko uncomfortable.

5. Rejoined
6.3Aired 30 October 1995 • 45 min
Stardate: 49195.5. Lenara Kahn, the new host of the wife of Dax's former host Torias, comes to the station. While they're not allowed to renew their relation, there's still a spark.

6. Starship Down
6.9Aired 6 November 1995 • 45 min
Stardate: 49263.5. A damaged Defiant must play a dangerous game of cat-and-mouse with two Jem'hadar ships inside a gas giant.

7. Little Green Men
7.8Aired 13 November 1995 • 45 min
Stardate: Unknown. Quark and Rom take Nog to Earth and Starfleet Academy, but a malfunction with the ship takes the crew back in time, to Roswell New Mexico in 1947.

8. The Sword of Kahless
6.5Aired 20 November 1995 • 45 min
Stardate: Unknown. Worf, Dax and the Klingon Dahar master Kor set out to find an ancient lost relic: the Sword of Kahless.

9. Our Man Bashir
7.3Aired 27 November 1995 • 45 min
Stardate: Unknown. When an transporter emergency turns the command crew into holosuite characters, Bashir's James Bond fantasy takes on a deadly reality.

10. Homefront (1)
7.5Aired 1 January 1996 • 45 min
Stardate: 49170.65. Sisko travels to Earth when a bombing at a Federation conference is determined to be the work of Changelings.

11. Paradise Lost (2)
7.9Aired 8 January 1996 • 45 min
Stardate: Unknown. When Starfleet institutes martial law to combat the Changeling Menace, Sisko begins to question if the Dominion is the real threat.

12. Crossfire
6.8Aired 29 January 1996 • 45 min
Stardate: Unknown. First Minister Shakaar visits the station, despite a threat of assassination. He falls in love with Kira much to Odo's dismay.

13. Return to Grace
7.4Aired 5 February 1996 • 45 min
Stardate: Unknown. Dukat returns, stripped of his prestige, to escort Kira to a Cardassian conference about the Dominion. But an attack by a Klingon raider may give Dukat a chance to redeem himself in the eyes of his government.

14. Sons of Mogh
6.8Aired 12 February 1996 • 45 min
Stardate: 49556.2. Worf's brother Kurn asks him to perform a death rite to regain his lost honor. Meanwhile Kira and O'Brien investigate Klingon activity near the Bajoran border.

15. Bar Association
6.8Aired 19 February 1996 • 45 min
Stardate: Unknown. Unfair working conditions and pay cuts cause Rom to organize a union of the employees of Quark's Bar. Meanwhile Worf still finds it hard to settle on the station.

16. Accession
6.7Aired 26 February 1996 • 45 min
Stardate: Unknown. A man claiming to be the emissary comes through the wormhole. Sisko is happy to give up his position. Meanwhile Keiko returns and O'Brien stops spending time with Bashir.

17. Rules of Engagement
6.9Aired 8 April 1996 • 45 min
Stardate: 49665.3. When Worf destroys a civilian shuttle during an engagement with the Klingons, an extradition hearing is held to see if he must face charges.

18. Hard Time
7.7Aired 15 April 1996 • 45 min
Stardate: Unknown. O'Brien tries to re-integrate to life on the station after serving 20 years in a virtual prison.

19. Shattered Mirror
6.5Aired 22 April 1996 • 45 min
Stardate: Unknown. When the Mirror Universe counterpart of Sisko's deceased wife lures Jake to the other side, Sisko must follow and help the human resistance against the Alliance's forces.

20. The Muse
5.3Aired 29 April 1996 • 45 min
Stardate: Unknown. A mysterious woman approaches Jake about his future as a writer. Odo promises to do whatever it takes to help Lwaxana Troi keep her baby over the father's wishes - even if it means marrying her himself.

21. For the Cause
7.0Aired 6 May 1996 • 45 min
Stardate: Unknown. Sisko must face betrayal when evidence surfaces that Kasidy is smuggling for the Maquis. Meanwhile Garak makes acquaintance with Ziyal.

22. To the Death
7.5Aired 13 May 1996 • 45 min
Stardate: 49904.2. A renegade group of Jem'Hadar plunders Deep Space Nine. Sisko agrees to a combat operation with loyal Jem'Hadar to prevent the renegades completing a planetary gateway.

23. The Quickening
6.9Aired 20 May 1996 • 45 min
Stardate: Unknown. Bashir tries to help a planet in the grips of a Dominion-engineered plague that guarantees a painful death.

24. Body Parts
6.9Aired 10 June 1996 • 45 min
Stardate: Unknown. Quarks hears on Ferenginar he is going to die. Rom convinces him to sell his remains. After an accident, Bashir has to move Keiko's baby to Kira's womb.

25. Broken Link
8.0Aired 17 June 1996 • 45 min
Stardate: 49962.4. Odo is suddenly struck by illness. He is barely able to hold shape. Bashir and Odo see no other alternative then going to the Founders. Garak wants to come along.