"Marvel's Agents of S.H.I.E.L.D" at PALEYFEST on March 23, 2014. After dominating the box office with "The Avengers" and the "Iron Man," "Thor," and "Captain America" franchises, Marvel returns to prime-time network television with its first series in over thirty years, teaming with sci-fi darlings Joss and Jed Whedon and Maurissa Tancharoen to create "Marvel's Agents of S.H.I.E.L.D." on ABC.