"I wouldn't worry too much. A being like Q has the ability to rectify any damage to the timelines..." A pause. "Assuming, of course, we're in the same timeline."

He's going to reach for a PADD.

"Which is something I have yet to have determined. I am aware, however, of Starfleet's Temporal Prime Directive, so, feel free to abide by it. The universe hasn't collapsed in on itself yet."