Star Trek: The Next Generation - Season 6 Episode 5 Schisms
8.3645 minutes
Stardate: 46154.2. Members of the crew are secretly abducted from the Enterprise to be used in bizarre experiments where they are dismembered and re-assembled without anyone's knowledge - including their own. The only signs that anything is wrong is a strange form of tiredness and no recollection of having slept well the night before.