Board Thread:The Panopticon/@comment-24361711-20151122175815/@comment-1293767-20151122184441

Danniesen wrote: The Quantum Shade is not the Raven. The Quantum Shade is the gas that possessed the Raven. A living gas, capable of speech, like the Gelth.

Quotes pertaining to the Quantum Shade:

The Doctor: "It's called a Quantum Shade. It's kind of a spirit. Once it's bound to a victim you can flee across all of time and all of the universe, it would still find you."

Rump: "Two ways to survive the Quantum Shade: the Shade's master removes the chronolock or you can give it to someone else."

Mayor Me: "Clara, I made a contract with the Shade when I put the chronolock on Rigsy. I promised it a soul and only I can break that contract. When you took it from him, you changed the terms. You cut me out of the deal."

None of them support any of your assertions. None of those say the gas possesses anyone. None of them say the gas can talk. What one does say is that the Quantum Shade has a master and in this case, that master is Mayor Me.

This is the statement about "they":

Mayor Me: "I made a deal to protect the street. They take you, I take the keys, you can't be traced. I do as They tell me and the street is safe." The Doctor: "'They'? Who are 'They'?" Mayor Me: "One more thing. Your confession dial. They have other means of procuring it, but I understand it's likely to be on your person."

There is no provable link between the Qunatum Shade and "They." It's pure speculation. I can equally argue that the Doctor questioning who "They" is suggests that the Quantum Shade (which he is evidently already familiar with yet doesn't come to the conclusion that the Quantum Shade is responsible) and "They" are separate entities.

Danniesen wrote: They is the Quantum Shade.

That is your theory.