Stardate: Unknown. The Trill homeworld is the setting, as Sisko and Bashir take Jadzia home for treatment when she begins experiencing hallucinations after playing a tune she can't recall.

Stardate: Unknown. After an attempt is made on Garak's life, Odo conducts the investigation on who tried to murder the Cardassian tailor - and why.

Stardate: Unknown. Jake, reporting from the front lines, sees what war truly is.

Stardate: 4523.7. Darvin, a disgraced Klingon spy, travels back in time to alter some events to his likings. The DS9 crew must find what he's trying to change and prevent it without altering the time line. They'll have to blend in with the crew from Star Trek: The Original Series.

Stardate: 50814.2. The DS9 crew discovers a small colony on a remote world that was originally populated by them 200 years earlier due to a time travel accident with the Defiant. The current colonists' lives depend on making sure that the accident happens again, even though they've now forewarned the crew that it will happen. Each crew member needs to decide if they are willing to give up their lives on DS9 in order to preserve the history of the colony.

Stardate: Unknown. A group of genetically engineered humans are brought to Dr. Bashir on DS9 in hopes of integrating them with the rest of the universe.

Stardate: Unknown. Chief O'Brien goes undercover to infiltrate an Orion crime ring.

Stardate: 52861.3. Odo begins his recovery from the deadly disease as Dr. Bashir informs him of Section 31's intentions of wiping out his race. A resistance mission goes bad for Kira and Garak and they end up hiding in the basement of the house that Garak grew up in, where they learned that Legate Damar has apparently become a casualty of war, despite him also hiding with them. Quark is chosen by the Grand Nagas as his successor upon his impending retirement to Risa.