Why did Tennant return to his time stream, forgetting the entire event, even though Smith entered Tennant's stream through the worm hole. Surely Tennant's is the main stream through this event?
Also, the Doctors just left everyone in the weapon storeroom discussing the treaty, and they never went back. When the girl gave her inhaler to her Zygon copy I thought that would be used as some plot point to identify which one was the human later on. But they just left that to resolve itself?