Morgar is shown speaking, obviously aware of his senses, when Zarm leaves his body for the first time, but when Kwame goes to steal the rings from his hands when Zarm is out and standing before him to talk to Baz, he does not react despite his senses of hearing, sight, and feeling that the earlier scene proves he possesses.
Zarm claims to have been behind every major tyranny in history, but when they were first shown meeting in "The Conqueror", Gaia, who had slept for a century before that year, mentioned that they had not seen each other in ages. Chances are that, if he had left Earth long before the previous century and had returned, she would have awoken to try to face him, so he could not have been behind every dictatorship if he was not on Earth.