Energy beings from a nebula displace Chakotay's consciousness from his body. The Doctor pronounces him brain-dead and B'Elanna turns to Chakotay's cultural beliefs to try to bring him back. Meanwhile, Chakotay's spirit roams the ship and infiltrates crew members in an attempt to warn his shipmates of the dangers of the nebula, but they mistake his efforts as a malicious alien manipulation.
Did You Know?
SPOILER: When analyzing the "alien" brainwave that was superimposed on other crew member's brain patterns, the Doctor says that it has an unusual energy signature, which he has never seen before. As established later, this new brainwave actually belonged to Chakotay. It would be rather strange that the Doctor would not have Chakotay's medical data on file and recognize his brain pattern instantly.
On the other hand, there is no telling how the process of his consciousness being detached from his own brain and wandering into another's could alter the energy signature of Chakotay's brainwaves. See more
[the Doctor gives an overview on how he reintegrated Chakotay's consciousness
Needless to say, it was a remarkable procedure. I would consider writing a paper about it if there were a convenient forum in which to publish it.
Referenced in Star Trek: Voyager: Virtuoso
Star Trek: Voyager - Main Title
Written by Jerry Goldsmith
Performed by Jay Chattaway See more