Time travel is one of those things that is great as a concept, but all too often a horrible miss in execution.  Be it in books, movies, or TV, too often the author thinks that the phrase "It's time travel, who can understand it?", or "Temporal physics gives me a headache," is all they need to get away with any sequence of illogic they can think of.  But time travel, like all things, must have self-consistent logic.

All one has to remember is Cause and Effect; you just have to think in something more than a linear three-dimensional fashion.  An event in the future can still be the cause of something in the past via a trip through time, as long as keep track of the sequences of cause and effect and what started what, even if most of it is more behind the scenes and n...

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