...I was time-traveling. By accident. If I'd introduced myself then, it could have destroyed the timeline. Here, though, my presence is already known, and your younger counterpart says the timeline has already been altered, and since you and I are both displaced I hope it won't cause the universe to implode any more than it already has if I meet you and say hello and I really admire you and it's a huge honor to make your acquaintance--

*breathes*

...I'm Julian. Doctor Julian Bashir.