Tierna was a Kazon and one of Seska's aides. USS Voyager answered a distress call from his shuttle and they rescue him. He tells Chakotay that Seska is dead and that he escaped by bribing a guard. Chakotay does not trust him, as Tierna was one of the Kazons that beat him when Chakotay infiltrated Cullah's ship. Tierna was in reality suicide bomber. He triggered a bomb that was embedded in his body and the explosion rendered Voyager helpless, and the Kazon were able to capture the ship.
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