Trollheart

Star Trek has a whole lot of this sort of thing: temporal mechanics they call it. Doctor Who you would think so also, but they tend to (at least in the new series) avoid it a lot by saying what I consider to be stupid things like "The future is always in flux" or "the time line is never written", which only serves to give them an out when they do something that should upset the timeline but, you know, doesn't.

There's another workaround used a lot, where they say things like "the future resolves itself by building a new timeline." A bit mad really: in the grandfather thing, the suggestion is that if you go back in time and kill your grandpa, then in the "new" timeline you create by that action, your grandmother never met that guy and in fact hooks up with another guy, who then becomes your new grandpa, and so time resolves itself. Seems a sort of pussy-out to me.

Yeah, "Futurama" has some great ones, but I think Homer says it best...

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Trollheart: Signature-free since April 2018