 " Unity " is the 17th episode of the third season of the American science fiction television series Star Trek : Voyager , the 59th episode overall . The episode first aired on the UPN network on February 12 , 1997 , as part of sweeps week . It was written by producer Kenneth Biller , and is the second episode to be directed by Rob Bowman .
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The episode begins with the crew of the Voyager 1701 exploring a Federation colony on the planet Kaelon II that has been ravaged by a mysterious plague.
The episode was written by producer Kenneth Biller , and is