Not to mention, when shooting scenes for a show, actors are often only there for the scenes they're in, and they're not even necessarily shot in order, so he often had no idea what was going on until he saw the completed episode, which he mentioned in the podcast he often didn't bother watching. So it wasn't uncommon for the things he had "forgotten" to be things he actually wasn't aware of in the first place.

Yeah I believe that's the jist of what he said on the podcast, spot on. Like my university days seem like a blur, but that has more to do with the constant work and tiredness so I can understand from a different perspective.

I went through a health scare and spent 65 days in the hospital, I could probably recall about 10-15% of my time there because other than the procedures and the talks with the doctors and nurses, I watched the food network and slept the whole time. I imagine its a somewhat similar deal. If something was worth remembering in the moment, I remember it.