Dang, it never occurred to me that after the "all one bird" thing was revealed that it actually matters what damaged the one that fell on the banks.

And, uh, I was absent for a while so pardon me if this was already covered, but if Kat sent the bird back using the Norn's magic time pool, doesn't that mean that she didn't actually invent or discover time travel? Which isn't how I expected this to go.