There's a long summer stretching out between now and the fall premiere of "Marvel's Agents of S.H.I.E.L.D.," and awesome trailers and cast photos won't be enough to hold us over until we start getting our weekly fix of Agent Coulson and company. To stay psyched for all things S.H.I.E.L.D., it wouldn't hurt to check out the decades' worth of Marvel Comics out there starring Nick Fury and his league of super spies. MTV Geek has a new series of articles spotlighting the spy organization's publication history to help guide you through the wide world of S.H.I.E.L.D. From modern day Nick Fury's humble beginnings as a supporting character in "Fantastic Four" to the slow reveal of S.H.I.E.L.D.'s reach in "Strange Tales," to the downright iconic work of Jim Steranko on "Nick Fury, Agent of S.H.I.E.L.D.," MTV Geek has you covered.