The season centers on the inevitable arrival of the in the Alpha Quadrant.
The season uses personal stories to ground the large-scale political drama: TV Review | Star Trek: Deep Space Nine | Season 5
: Gul Dukat shocks the quadrant by negotiating Cardassia’s entry into the Dominion, instantly making it a major power again.
: In response to this new threat, the Klingon Empire ends its war with the Federation and reinstates the Khitomer Accords , with General Martok staying on the station as a representative.