Superheroes TV Marvel’s Agents of S.H.I.E.L.D – 6th season opener (trailer). May 9, 2019 ColonelFrog Agents of S.H.I.E.L.D 0 min read Here’s the Agents of S.H.I.E.L.D season six opener, in which the action seems rather space-based. Hey, where’s the Guardians of the Galaxy when you need them? Marvel’s Agents of S.H.I.E.L.D – 6th season opener (trailer).