See something, say something.
That genius slogan was supposed to be the answer to all of our problems, post-9/11, but when you really stripped down that catchy phrase, what you were left with were a lot of paranoid, and most of the times racist, people pointing the finger at those they didn't like, those who were different, those they feared.
Sure, every once in a while would document the rare occasion they had real reason to be concerned, like Saul (Mandy Patinkin) in Homeland. But watching Brody's (Damian Lewis) taped confession to a crime he never ended up committing creates more protocol problems than allows answers. Saul now knows that Carrie's (Claire Danes) instincts about Brody were right, but because Brody hasn't actually acted yet, they can't really move on him. They can restore the watch on him, sitting, waiting, not quite hoping he actually takes action but still stagnant until the moment he actually does. To grab him too soon would be to put themselves under fire.
I have to admit, as much as I was thrilled to see Homeland "go there" so quickly with revealing the truth about Brody to the CIA, I was disappointed by the way the rest of "Beirut is Back" went down. I was hoping that Carrie's informant was lying about Abu Nazir (Navid Negahban). I wanted her to just be using Carrie to get her out of a terrible situation. I wanted Carrie's instincts about her to be proven wrong this time only to allow the punch to be that much more powerful when it became obvious she was right about Brody.
I know that wouldn't have allowed for Brody's panicky save of Nadir-- although, maybe it could have: maybe he could have assumed Nadir was on his way and still proved his loyalty by sending the text. Because the thing is, the time that Carrie was clearest about Brody's intentions and Abu's overall plan was when she was deep in her disease. She was so honed in, so focused, so obsessed, but she was right. There's something beautiful and poetic in that. There's a reason that movie was called A Beautiful Mind.