Sons of Anarchy Season 4 Trailer! Get your first glimpse of the cast in season 4 in this new TV spot for FX's hit biker drama. Brian B. — July 5, 2011 in TV News Facebook Twitter Reddit Email Comment FX has unveiled the first trailer for season 4 of their hit outlaw biker drama, Sons of Anarchy, which returns this September. Check it out below! Brian B.