Star Trek: Voyager 3.12 - Distant Origin/Displaced

Distant Origin Stardate 50899.1 Trying to prove that his lizard-like people are actually descended from a race of warm-blooded bipeds from a distant sector of the galaxy, the Voth scientist Professor Gegen stumbles across the perfect piece of evidence to take back to his superiors: a human called Chakotay... Displaced Stardate 50912.4 The sudden and inxplicable appearance of a bewildered alien on Voyager is matched by the equally strange disappearance of Kes. As more aliens begin to appear with ominous regularity, Voyager's crew members bein to disappear...