Agent Coulson and the Agents of S.H.I.E.L.D. are back, but not for as long as we are used to. The ABC series has been renewed for it's 6th season but only 13 episodes have been ordered, instead of the usual 22. Does this signal an end for the series? Or are there larger implications caused by the events of "Avengers: Infinity War" that warrant a shorter season? We'll just have to wait and see.