Last night's episode of Revenge!

I have been watching this series and enjoying it but I really thought last night's episode was too bizarre for words. Somehow we are expect to believe that Emily tracked down the child psychiatrist that treated her when she was small after the woman left the mother-daughter tea and cracked her over the head knocking her out. Then somehow she got her into a vehicle, dragged her into a storage unit and locked her inside? All this without any help? In addition this is the first episode in which she actually used physical violence against one of the people she is trying to get revenge against. I had sympathy for her up to this point but I think this episode is causing me to rethink.