That was King George, and I don't think we did see him again after that. The actor that played him reprised an old recurring role he had on NCIS towards the end of the season, so that might be why we didn't see him on OUAT again.
As for the episode, I really enjoyed it. Hook's backstory was interesting, and the stuff with him and Charming was good. I'm glad that they already resolved the whole thing with Charming being poisoned, I hate when the drag out forever.
EDIT: Oops, Anwar beat me to the answer about George. I forgot about him being arrested.