From 2009: Katie McGrath plays Lady Morgana in the new NBC dramatic import, “Merlin.” Katie is a relative newcomer to acting, as I understand it, although American audiences may have seen her in an episode of Showtime’s popular drama, “The Tudors,” before she landed a plum role on “Merlin.” Did I say plum? That’s not quite accurate, because she’s more of a peach! Uh, did I just say that out loud? Sometimes I embarrass myself.