Robert O'Reilly

Sisko (Avery Brooks) refuses Worf's (Michael Dorn) resignation; Deep Space Nine is attacked by a Klingon war fleet. With Terry Farrell, Alexander Siddig, Marc Alaimo and Robert O'Reilly.

Lt. Cmdr. Worf must choose between Starfleet and his heritage when the Klingon Empire withdraws from the Federation peace treaty.

The Klingons join the Federation's fight against the Dominion as Gul Dukat reveals his self-serving allegiance.

Sisko and his crew masquerade as Klingons to expose a Changeling who has incited a war between the Federation and the Klingon empire.

Kira masterminds a plot to obtain an enemy weapon; Worf investigates a power shift within the Klingon Empire.

Quark's bragging backfires and he ends up on the Klingon homeworld married to the widow of a warrior he supposedly killed.