Star Trek: Deep Space Nine - Season 7 Episode 21 When It Rains... At the edge of the Final Frontier, the Universe's greatest mystery is about to unfold.
Overview: Stardate: Unknown. Kira gets sent behind Cardassian lines in an effort to train them in resistance fighting. When Dr. Bashir learns of the deadly disease that Odo is infected with, he's met with barriers when trying to obtain his medical records from Starfleet. Martok gets blindsided by Gowron when he arrives on DS9, announcing that he has assumed command of the Klingon fleet.