The 43-year-old BBC star describes the show, now entering its fourth season, as "the little train that was" and says of his murder detective character, "He has a lot of demons. You do end up taking some of that home with you."
The 43-year-old BBC star describes the show, now entering its fourth season, as "the little train that was" and says of his murder detective character, "He has a lot of demons. You do end up taking some of that home with you."