I'm afraid if you looked slightly more carefully at the scene you took the picture of you'll notice that I don't think we really need to worry about the possibility of temporal paradox.

Or maybe, given what's happening with the series at the moment, we should really start to worry!!!

[I admit I had to heighten the image contrast and enlarge the suspicious section before my suspicions were truly confirmed. Still, I really suggest that you should get your eyes checked. After all, you were there! <grin>]