10 Star Trek Timelines That Were Erased

10. Voyager's Year Of Hell

With the fourth season of Star Trek: Voyager upping the ante for the show, the writers chose to swing big. Introducing Seven of Nine, and casting Jeri Ryan in the part, was a clear ratings grab that, despite that obvious attempt to appeal to the younger male audience, accidentally delivered one of the most beloved characters in the franchise. 

How, then, to keep the momentum going? Kick seven layers of crap out of the ship, of course! Year Of Hell delivered on some of the promise that the show had to offer. A Starfleet ship, alone in the Delta Quadrant, rapidly running out of resources. It had no safe harbour to lay low (save for a less-than-friendly nebula), and the crew's battered morale was evident in the bulkheads themselves.

This is easily one of the most popular stories in Voyager's seven-year run, though it is all undone at the end of the second episode. Perhaps the writers were nervous, fearing the audience wouldn't be able to handle a season of dark, heavy imagery (clearly, they hadn't even dreamed of Discovery's first season) and opted for the reset. There is much to be grateful for though. This timeline saw Tuvok lose his eyesight and Janeway lose her life, both of which were happily undone by the latter's heroic sacrifice.