I just recently watched this episode and I started overthinking. How did this episode really start, someone had to start it somewhere, but it couldn’t be the doctor, martha, or sally. I know at the end she gave the doctor information to save her and him from the angels, yet it leaves the question of how does that information exist. I know the doctor said the timeline is a bunch of scrambled lines. But for the information to exist, someone had to get the information through the cycle the first time for the doctor to take over every subsequent time. It’s a big deal, without the transcript the doc is stuck forever, Sally probably doesn’t revisit the house, and the whole story ends there. Who started the transcript, and where did it originally come from?