Dr. Robert Carlyle, OBE, actually, although he doesn't use the Doctor title.
Robert is an actor born in Glasgow, and he frequently plays Violent Glaswegian
characters as well as villains in general. Despite this, his co-stars on Once Upon a Time
have noted that it's really hard to be scared of him/act as such because he's a really nice guy
in real life. His best known roles include The Full Monty
, The World Is Not Enough
, and the aforementioned Once Upon a Time