Star Trek: 10 MORE Greatest Time Travel Episodes

6. Year Of Hell, Year Of Hell, Part II

Technically speaking, there is no travelling in time in Year of Hell and Year of Hell, Part II, but we dare you to argue the minutiae with Captain Janeway as she barrels towards the Krenim timeship. "Time's up!" is not just a reset, it's also one of the best lines never spoken.

The story is getting there and back again; the power of Year of Hell is the menace of revisionism. You don't need a time machine to rewrite the past, just a megalomaniac, though a time machine does help. As Voyager traverses the rigours of the episode title, Janeway never loses sight of Annorax. Her dogged determination is underscored by an acting masterclass. As for Annorax, he gets off a little easy where history is concerned. But then, if you do get a do-over, you'd better do things right.

After Before and After, there were plans for the "Year of Hell" to become a hell of a season. However, twenty-six episodes that never happened would have been more than a waste of time AND a waste of other ideas. Year of Hell ultimately works because it is self-contained: twelve months in one hour-and-a-half is time enough.