The Defiant is off to show the Federation's presence to the new Tzenkethi government. While underway the ship malfunctions and repeated instances leads Sisko to believe a changeling's onboard, engaging in sabotage.
Sisko takes the Defiant to Tzenkethi space. Whilst working on the ship O'Brien hears strange sounds, and soon, breakdowns and mishaps start occurring. Sisko believes tone of those on-board causing what he - or she - appears to be, and the occurrences are acts of sabotage.—Arnoud Tiele (imdb@tiele.nl)