Stardate not given: Voyager offers the Malon their help in sealing a radiation leak in an abandoned freighter that is about to poison a whole sector. The Malon, however, are reluctant to return, partially because of a mythical monster called "Vihaar" supposedly living in the radioactive waste. On the freighter, the Vihaar actually appears in the form of a poisoned subordinated core worker, and B'Elanna has to kill him in self-defense.

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