25CREATED A TIME LOOP AT SEVEN
Time travel is as baked into the fabric of science fiction as alternate universes and futuristic technology and Star Trek is no exception. The first example of time travel chronologically is surprisingly not when the Enterprise crew went back to the '80s to save some whales, it was when Spock
went back in time to save himself.
See, when he was seven, Spock was going through a growth ritual in the wilds of Vulcan with his pet alien dog when he was set upon by a carnivorous predator. He was only saved by the timely interference of who he assumed to be simply an older cousin. In reality, it was Spock himself who had come back to prevent his own death, thus creating an infinite time loop which could only be broken with Spock’s death.