The Omega Directive

Plot:

Voyager's sensor detect a rare particle theoretically capable of damaging subspace and nullifying warp travel. Under a classified directive known only to Starfleet Captains and above, Janeway leads Voyager on a mission to destroy all traces of the particle. Seven of Nine is hesitant to destroy the Omega particle, remembering the Borg revered it as the embodiment of perfection.