Worst Case Scenario

B'Elanna discovers a holo simulation that simulates a Maquis mutiny aboard Voyager. The simulation quickly becomes popular among the crew before they discover that it's actually incomplete and that the author is Tuvok who intended it to be a security simulation in the early days after Voyager had absorbed the Maquis crew. As the crew integrated well, he never finished the simulation as the threat of such a mutiny was no longer present. Now, he (along with Tom Paris) is compelled by the crew to finish the simulation as a "holo novel" for their entertainment. As he goes about his task, an unexpected turn of events puts him and Tom Paris in mortal danger.

The episode is notable as a final echo of the first season of Voyager before the show changed drastically in after the third season. Not to mention that alternate realities tend to make for compelling viewing.