The Imitation Game was quite good (albeit with a fair amount of dramatic license) and, although I was already familiar with Alan Turing's life and struggles, watching the movie makes me feel like, if time travel is ever possible, the first thing I'd do would be to go back to the 40's to give Alan Turing a hug.
Wait, no, Alan Turing was probably not the hugging kind. Scrap that.
Ok, I got it. Here's what I would do: I'd go back in my TARDIS (yes, we're doing a Doctor Who / Alan Turing crossover, deal with it) to the time right before he committed suicide. As a man of science, Turing would be easily persuaded to step into the TARDIS because he would be fascinated by time travel (also, when he saw me step out of the TARDIS he would be all like "*swoon* Sign me up!")
Anyway, we would head to the present day where I would show him all the amazing things that his work has made possible. I would also show him how far gay rights have come, and how two men (or two women, or two gender-nonconforming persons, or etc.) can live together and openly and, in some places, even get married. Finally, we would also drop by an award ceremony where we would discreetly stand in the back and I would say "See that man over there? He's receiving the highest honor that can be bestowed on a computer scientist. Do you know what the award is called?" "No, what is it?" "The A.M. Turing Award". And then he'll start crying, and then I'll probably cry a little too.
Then we would go back to his time and he would say that he wants to live to see the future, but I would say "I'm sorry, I'm so, so sorry" because his death is a fixed point in time, and him not committing suicide would render the space-time continuum asunder. But as I get into the TARDIS, I realize "Wait, THE Alan Turing doesn't have die, only AN Alan Turing has to!" and (plot twist!) we replace him with a dead ganger made to look just like him. After offering him several choices, Turing finally decides to settle down in the 27th century in a planet inhabited entirely by gay mathematicians.
Steven Moffat: I await your call so I can sell the rights to this story to the BBC.
Seriously, though, after visiting the site of Harvey Milk's camera store, the GLBT museum in SF, and dwelling on how fucked up it is that Alan Turing, the father of Computer Science, was driven to suicide because of his homosexuality, I can't help but feel amazingly grateful to have been born in this time. The fight is not over yet, but we've come this far by standing on the shoulders of (very fabulous) giants.