This is a very interesting plot. Chakotay is injured in a blast and the Doctor injects him with some serum. The side effect of this allows Chakotay to experience different point of time on different parts of the ship (also different Voyager episodes). For instance, Engineering is stuck in the episode "Basics" in which the Kazon/Seska control Voyager. The bridge is stuck in episode one "Caretaker". Chakotay must get all of the various "episodes" to work together in order to get everything back to normal.
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