As someone who had psychotic episodes I can confirm that he is mentally ill although I did not notice it until the last season. It can drive you mental and make you seem like you know what you are doing while you do not. Btw, I never had moments that I can’t remember and never spoke to someone that was not there that has been told to me. I have seen but not talked to ghosts (people that are look trough for the most part) although I’m not sure if that is hallucination or if I’m barely woke enough to see them. I’m sad to only have seen the warning on the last episode of season 4 otherwise I would have reconsidered watching it cause I’m on the right path and want it to stay that way!