Star Trek: Deep Space Nine

By Inferno's Light (5x15)

Air date: Feb 17, 1997

Stardate: 50564.2 When the Dominion fleet comes through the wormhole, it soon becomes clear that Cardassia has allied itself with the Dominion and that war is not far off. As the forces of the Alpha Quadrant assemble, the changeling posing as Dr. Bashir is wrecking havoc on Deep Space Nine.