[The more she explains, the less he understands. Ezra's brows furrow down.]

But- That doesn't make any sense. If someone from the past was here, wouldn't that change the present, or the future? I mean, if you're from the future, and you told me about things I haven't seen yet, and I went back and did things different because I knew about those things, wouldn't that change everything that happens after?

[He's getting a headache just thinking about it.]