Star Trek: Voyager - Season 4 Episode 12 -

Neelix experiences a crisis of faith when, after being dead for nearly nineteen hours, Seven of Nine revives him using her Borg technology. On awakening, Neelix has no memory of experiencing the Talaxian afterlife and begins to doubt everything his culture believes about the post-thanatic experience and their spiritual place in the universe. His crisis is played out with the help of Chakotay's vision quest.