Need a TV hero? Agent Coulson gets the job done

Critic's Notebook: 'Marvel's Agents of S.H.I.E.L.D.' no-fuss leader is there to save the day from TV's complex antiheroes, a real bunch of downers.Of all the new fall shows, ABC's "Marvel's Agents of S.H.I.E.L.D." was the most anticipated and continues to be among the most closely monitored by critics, columnists and Industry bloggers. Many people who are not ABC executives want this show to succeed: Avengers fans, Joss Whedon fans, Clark Gregg fans and parents clinging to that quaint old notion...