Sew Freak, that would be James Spader who plays Reddington. Isn't he just great in this role? I have already binge watched the 3rd season. The premise is, (if I understand correctly) that the audience knows that Reddington is Lizzy's father. She just doesn't know it yet. She is squirming under his interference, she cannot understand his fascination/obsession with her. But he and Dembe are bound and determined to protect her from his enemies, and he uses her to protect himself from them at the same time.
I like the FBI characters too. To anyone who hasn't watched the 3rd season yet, it is a wild roller coaster ride. I was totally hooked.
Suz, it is on Netflix streaming right now, all three seasons. Perfect for a binge watch.