Voyager runs into a Klingon ship, they are unaware that peace had been made between the two races over 80 years ago. They eventually believe Janeway when the notice Torres being pregnant. They also believe her baby to be the "savior". When it is discovered that these Klingons have a rare disease, they use the babies stem cells to cure them. Literally making it the savior.
Weird side plot: Neelix has sex with a Klingon woman.
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