Inside Marvel's Buzzy New Cult Fave 'Agents of S.H.I.E.L.D.'

One day it's a punctured plane, the next a horde of Peruvian rebels blasting AK-47s, the next a mad scientist or a serial killer. There always seems to be danger in the air on "Marvel's Agents of S.H.I.E.L.D.," though that's not the case right now.