Star Trek: 10 Terrible Ways To Time Travel
3. Artificially-Generated Temporal Rift
Captain Braxton's at it again, or, rather, he's at it for the first time in the strict and most forward-flowing of chronologies. Yet another time travel method from the 29th century that can, especially in the wrong and untrained hands, cause the most calamitous of catastrophes: the destruction of Earth's solar system, for one; the use of the phrase "far out," for two.
Captain Braxton's time travel technique in Future's End was 'temporal rift,' artificially generated by his single-occupant timeship Aeon (another on-the-nose vessel name from the 29th century time police). Far from preventing catastrophe, Braxton was the cause of it. Well, it was Henry Starling, sly entrepreneur and winner of worst use of photoshop several years running, who would/did/will fly the uncalibrated Aeon into the future (before Captain Janeway's photon torpedo badassery), but that means nothing without Braxton's intervention in the first place. A leads to B leads to C leads to A, as Braxton himself admits in late 20th century Santa Monica. Yes, yes. We get it! Mostly.
It's worth noting that alternate future Admiral Janeway used a relatively similar, and equally terrible, technology — nabbed from a particularly p**sed-off Klingon — to get to the past for shindigs with her younger self. The 'chrono deflector' burnt out en route, and so the whole thing was a one-way trip.