Board Thread:Spoilers!/@comment-27060727-20170222030619/@comment-24674051-20170502034121

True, but not only did David and Snow not remember Hook, but Hook did not remember David and Snow. And given how easily he remembered David's dad once he saw the picture from the book, I'd have to assume that Killian has a reasonably good sense of recall, and would likely not forget Snow and David without magical interference.