Gonna use this thread as my personal notebook for all of the episodes [THEORY]

CHAPTER ONE:  

I think that the hospital is just a house for all of Davids personalities since they all wear the same outfits. When he swapped bodies with Sydney she became the dominant personality in his mind and David became a background personality. I also think that Sydney is supposed to be Legions pyrokinetic personality of Cindy. Also in this show Yellow is the color of Fear, like in DC with the Sinestro Corps, Azazel in Supernatural etc. I'm not sure who plays TDWTYE but his facial features really look similar to the guy that plays David

CHAPTER TWO:  

Ok, so I just saw episode 2 and I still think that we can't trust ANYTHING we see until the last 2 or 3 episodes. And I still think that most of the people we saw on screen are a part of Legion's personalities ESPECIALLY the superpowered people. For example, the elevator scene might be two of his personalities having an argument and Sydney wins.Like, he has some really chill personalities like Syd,Cary etc. and also some evil personalities like "World's angriest boy", The Devil With the Yellow Eyes etc. If they're not I'd like to think that Jean's Melanie Bird is actually Cassandra Nova from the comics.  

David seems to be easily distracted by animals and I don't know what connection or symbolism that has to the overall story.  

The other mystery I haven't figured out yet is how there are no records of him in the mental institution, and how they seem to be very chill even tho the whole hospital was reshaped and Lenny died. That's why I think that we still can't trust anything.  

Side-not for episode one: I just thought of the opening where they go through his childhood, and every scene has more and more people added to it. Maybe those are all personalities that he "collected" throughout the years.