When a mysterious intruder on the "Enterprise" cunningly steals Spock's brain, Bones tries to keep the Vulcan alive while Kirk tracks down the thief.
The crew fights for survival when a mysterious force attacks the ship's life- support systems.
Kirk pursues aliens who have taken Spock's brain.
It has been six weeks since Enterprise's new mission began and the crew have made virtually no progress. Now finally, they may have a lead as Enterprise is en route to a mining colony that is supposed to have a Xindi worker.
With the crew stranded on a barren planet, and the ship controlled by the Kazon, it's up to Tom Paris, Lon Suder, and The Doctor to retake Voyager and rescue their crewmates.
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