I'm sorry for the incredibly late reply!

Boo for time travel, which has always been my least favorite fantasy plot device.

Especially because no matter what the people do in the past, it never seems to effect anything when they go back to the present!

Then again, some things look terrible on paper and translate to screen brilliantly. I'm hoping this will be one of those things.

I am, too, because I don't want to hate this episode, since it deals with John and Mary. Fingers crossed it works!