Hugo (Hurley) Reyes tries to put time travel to a useful purpose in the later part of the LOST saga by...if you don't already know could you guess?
Hugo is caught scribbling in a notebook while asking off-beat questions like, "How do you spell 'bounty hunter' ?" His exasperated companion grabs the book and begins reading a synopsis of the plotline of Star Wars. Hugo explains that he is going to take advantage of his journey back to the 1970's by sending George Lucas suggestions on improving the plot. This, if I remember rightly, provokes a response of the style "Are you crazy??" This is what makes Hugo such a loveable guy; he's not interested in acquiring power; he just wants to improve Star Wars. This is unfortunate because his altruism is doomed. There are two flaws in trying to improve Lucas' work:
1. If it happened, a separate timeline would split off and Hugo wouldn't know about it because his history and memory of it would be stuck in his timeline. Otherwise, he couldn't remember Star Wars with the deficiencies.
2. Star Wars is beyond saving.
It is the most heinous piece of trite, plagiarised space in this galaxy or any other. The special effects were enough to boost it in 1977 when the series first appeared. That was then. Once the novelty wore off it was obviously a fraud upon the science-fiction fan base. I have suspected for a long time that Lucas actually despises the SF community and is deliberately offering dross in the same manner as a couple of mythical tailors once made a king clothes from moonbeams.