This show could have relied on fantastical technology or unending computer-generated explosions and gunfights to carry an audience, but it doesn't. Oh, you'll get to see plenty of submachine gun-facilitated room breaches and you'll get your bomb-defusing suspense. But the real suspense, and the real investment, come in original storylines and good dialog. But be warned: part of the realism and originality here comes from a lack of willingness to unreasonably protect the favored characters from the realities of their jobs. Minds and bodies both will be broken.