I think I posted about him in Salmon Fishing in the Yemen when the show first started. He was in the movie a fair amount at the beginning and the end - I think he was 5th billed. He just looked different because of the haircut. While I love Ewan MacGregor, it wouldn't have even been a question between him and Tom Mison's character in that movie. He was also pretty dreamy in Lost in Austen.
That coat must be pretty ripe at this point. I understand wanting him in period costume, but it's getting distracting. I can't stop wishing they would show his clothes getting washed.