Cracked Mirror
Summary
The Protostar successfully proto-jumps to Voyager's position, only to arrive in an alternate reality where Janeway and Noum died trying to rescue Chakotay and then in one where the Federation was destroyed by the living construct. The crew discovers that their jump has torn the weakened fabric of the universe and splintered Voyager into a number of different realities which also has a negative effect on Gwyn. While Rok and Zero get trapped on a Voyager commanded by Tuvix, the others – aside from Maj'el who is accidentally left behind – land in the Mirror Universe where they face off with Janeway and Chakotay's evil counterparts. With the Loom threatening her universe, Mirror Janeway reluctantly allows them to use her ship to emit a pulse that closes the rift. Arriving on the correct Voyager, Chakotay is finally reunited with Janeway.
Summary from Wikipedia, CC BY-SA 4.0.
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