Star Trek: 15 Greatest Ever Time Travel Episodes

15. Time's Arrow - TNG

Time's Arrow is far from one of the most beloved Star Trek episodes and it often gets accused of stretching an only passable concept into a two part event that didn't deserve the billing, but it remains an enjoyable romp. And compared to some of the more mediocre episodes of Voyager and Enterprise, it might as well be a bloody masterpiece.

The episodes cleverly centre on Data's concept of mortality as he discovers that he will be destroyed at some point in the future after travelling to the past. Naturally, when investigating traces of a mysterious alien race, he ends up being transported to the late 19th Century where he meets Guinan, and more astonishingly Mark Twain.

Though the story is good fun, the most entertaining aspect is Jerry Hardin's frankly ridiculous performance as Twain. He chews scenery with reckless abandon, camps it right up and is clearly having far more fun than he really has any right to. He almost makes up for the slight lack of dramatic tension in an otherwise underrated episode.