Marvel's 'Agents of S.H.I.E.L.D.' won't fully unveil its pilot episode until September 24 (at least for those who weren't at Comic-Con 2013), but the long wait for a fresh glimpse into the Joss Whedon-helmed pilot episode has finally come to an end. ABC has released a massive new gallery of photos from Marvel's 'Agents of S.H.I.E.L.D.' pilot, along with a familiar guest star to 'Firefly' fans!

In addition to 'How I Met Your Mother' star Cobie Smulders' formerly top secret appearance in the pilot reprising her 'Avengers' role of Agent Maria Hill, it seems the episode's other fan-friendly guest spot has made it to the surface as well. Among the brickton of new photos below, we spied Ron Glass (Shepherd Book) in his role as a mysterious S.H.I.E.L.D. scientist!

So, what can we learn from the many photos that hasn't already been gleamed? Well, there isn't much to go on for anyone hoping to uncover the identity of J. August Richards' mysterious strongman character, though the figure clearly appears troubled, and the focus of everyone's search as the pilot moves through set pieces in a populated train station, and Coulson's mysterious hexagonal interview room.

If nothing else, we've got excellent new looks at Clark Gregg’s resurrected Agent Phil CoulsonMing-Na as veteran agent Melinda May, Chloe Bennet as hacker Skye, Brett Dalton as Agent Grant Ward, and Elizabeth Henstridge and Iain De Caestecker as science team Gemma Simmons and Leo Fitz. And say, who's that mystery redhead waiting inside a parked car, with an unseen figure in the back?

Well, what are you waiting for? Obsess over all 40+ Marvel's 'Agents of S.H.I.E.L.D.' photos below, and tell us what mysteries you've uncovered in the comments!

Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot Ron Glass
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Marvels Agents of SHIELD Photos Pilot J August Richards
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Marvels Agents of SHIELD Photos Pilot Ming Na
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot Cobie Smulders
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot Maria Hill
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot Phil Coulson
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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Marvels Agents of SHIELD Photos Pilot
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