Agents of S.H.I.E.L.D., is an American television series created for ABC by Joss Whedon , Jed Whedon , and Maurissa Tancharoen , based on the Marvel Comics organization S.H.I.E.L.D. (Strategic Homeland Intervention, Enforcement and Logistics Division), a fictional peacekeeping and spy agency in a world populated with superheroes and numerous supernatural phenomena. The series is produced by ABC Studios , Marvel Television , and Mutant Enemyand is set in the Marvel Cinematic Universe (MCU), sharing continuity with the films in that franchise. It revolves around the character of Phil Coulson , with Clark Gregg reprising his role from the film series . The second season premiered on September 23, 2014.