Ex-Machina plot spoilers ahead, friends.
Caleb gains entry to Nathan's room and uses his computer to view video logs of Nathan creating the previous AI attempts. This seems to shock and disgust Caleb and makes him realize that, in his mind, Nathan really is a bad guy.
Why does this spark a change in Caleb? I feel like I've missed something here. Caleb seems taken aback by this. Was Nathan doing something wrong that I missed? It seemed to me that he was just working on the robots. It wasn't pretty for sure, but if you're going to create life, you're bound to make some mistakes
Did I miss some obvious wrong-doing or was this simply a culmination of
the psychological manipulation Ava was playing on him the whole time?