The first season of Hayley Atwell's Marvel show will air in JulyInspired by the Marvel one-shot short film of the same name, the eight-episode Agent Carter TV show aired on American TV screens in January, but British fans of Hayley Atwell's secret agent - as originally seen in both standalone Captain America films, as well as more recently in Avengers: Age Of Ultron - were left in limbo as to when they'd get to see the first series.