No, please not time travel. That really would be a different Star Trek. It wouldn't have the same mission. With this new device they'd be obligated as time travel personnel. I like how Trek has represented time travel thus far as something that's with limits. A Doc Brown time travel device is time travel with no limits and would change the plot and mission of Star Trek from exploring new worlds existing in your own existing time period, to going back in time to see how dinosaurs died.
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