They, in my opinion, were and are the most interesting charaters in the show. We had four episodes at the end of series two and beginning of series three without any glimpse of either of them. I would have love to have seen the wedding, their flat and some other characters from Ireland. Perhaps if Tom and Sybbie have to leave Downton we an watch them building a new life in Ireland, although I would prefer to see Sybbie grow up in Downton and watch scenes with her and George as they grow older. Any thoughts?