"Agents of S.H.I.E.L.D." Dominates Tuesday Ratings

"Agents of S.H.I.E.L.D." Dominates Tuesday Ratings: With 11.9 million viewers and an impressive 4.6 rating, the debut episode of "Marvel's Agents of S.H.I.E.L.D." is the highest-rated TV drama premiere in nearly four years.