Stardate 51471.3: The crew is plagued by nightmares with one commonality: the appearance of an unknown alien. When Harry Kim and some other crew members fall asleep and the Doctor can't wake them, Chakotay comes up with a plan to use lucid dreaming to stay in control of his dream. He establishes Earth's Moon as a sign that he is asleep, and tapping his hand three times as a means to wake up. In his dream, he communicates with the alien and can convince him to allow the crew to wake up again once Voyager has passed their space. He taps his hand, wakes up and tells Janeway to proceed like discussed with the alien. But once Voyager has reached the edge of the aliens' space and everyone is awake again, the aliens attack and capture Voyager. Chakotay accesses a console in an attempt to retake the ship. The Moon appears, telling him he is still asleep. He taps his hand again and now awakes for real. The Doctor tells him everyone else is asleep now. It appears that all have the same dream of being prisoners of the aliens. The two track the neurogenic field that causes the dreams to a planet. Chakotay beams down to a spacious chamber with the sleeping aliens. He does not manage to destroy the neurogenic transmitter. Instead of taking the injection that would help him to stay awake, he gives it to one of the aliens, who disappears from the dream world. Chakotay then falls asleep himself, telling the leader of the aliens that the Doctor would destroy the chamber with a photon torpedo if he didn't call him. The aliens have no choice but to finally end the dream.

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