4-19: Shattered Mirror
The mirror Jennifer Sisko lures Jake and Benjamin to the alternate universe to assist with building another U.S.S. Defiant.
Unbeknownst to Kira, Dukat has a secret agenda when he offers to assist rescue survivors of The Ravinok.
4-01: The Way of the Warrior, Part I
When a Gowron-lead fleet of Klingon attack ships arrives at DS9, Sisko calls in a familiar Klingon expert for reinforcement.