3-12: Past Tense, Part II
Sisko, Bashir, and Dax are caught in the middle of the violent Bell Riots of 2024.
3-19: Through The Looking Glass
Sisko is forced to persuade the alternative-universe version of his wife to join the Terran Rebels to save her life.
Jadzia meets the previous Dax hosts through the Trill zhian'tara ceremony, while Nog tries to enter Starfleet Academy.
The Defiant discovers a planet that phases in and out of this universe every sixty years.