I have to say Homeland is my favorite right now. Tense, well-written and pretty much a nail-biter for the whole episode. It's about an Afganistan POW who comes home after being kept prisoner for 8 years. Everyone thinks he's a hero, except the one federal agent who thinks he's been brainwashed. Right now, she has his house illegally bugged and is watching every move he makes, waiting for him to make a mistake. Great writing and very believable.