Rhys was double-excellent in the Americans.
Excellent as Perry Mason.
Loved him in the Beast in Me (what a great psychopath he brings to the screen).
He did a short turn in "Girls" playing a priapic author / tutor who persistently seduced his students. Hannah (Lena Dunham's character), a great fan of his work, goes to his house to interview him and calls out his behaviour. Rhys's character convinces Hannah that the girls were all fully concensual and He is No Big Bad Wolf. Then he attempts a seduction of Hannah which she rejects. The expression on his face when he observes her realising that she has been tricked is worth an Oscar on its own. It sounds 'orrible but it was very funny. A real Stinker out of Rhys's box of tricks.