So we finally get a little backstory but as it ends up, we still really don't have much information about what happened to Coulson. We do know he wasn't really in Tahiti, which was really just them messing with his brain to help him forget all the nasty surgeries that they performed on him. So why really was he so important that they needed to rebuild(?) him? It was interesting and entertaining though. I liked how Skye made a lot of progress on the outside but it was really pretty predictable that May wanted to get her off the plane based on the wording.