Ranma wakes up to find himself half a world away, and finds that that is just the beginning.

Crystal Tokyo is not a given and the last unascended Ancient initiates a chain of events that will thrust Usagi, Ranma and O'Neill out into the frontier, where they will either secure the future or watch the Universe itself fall silent. R.5/SM/SG1

Just when you thought nothing stranger could happen to the SGC, they get an unexpected guest. Oneshot.