Action-adventure drama series Marvel's Agents of S.H.I.E.L.D. premieres Tuesday night on ABC. Hours before the debut, ABC unveiled a weekly companion web series that will explore the "mythology, lore and technical wizardry" that the TV show's agents face, as they encounter mysterious people with superpowers throughout the first season.
Called Marvel's Agents of S.H.I.E.L.D.: Declassified, the behind-the-scenes series will live online at ABC.com, WatchABC.com, the Watch ABC mobile app and Marvel.com. Comedian Brett Erlich will host. New episodes will arrive on the web every Monday morning, with three of the installments featuring guests.
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Erlich gives a rundown of what to anticipate in the series' first episode, below:

Marvel's Agents of S.H.I.E.L.D. is based on the Marvel Comics organization S.H.I.E.L.D., also known as Strategic Homeland Intervention, Enforcement and Logistics Division.
Created by Joss Whedon, Jed Whedon and Maurissa Tancharoen, the series stars Clark Gregg as Agent Phil Coulson, Ming-Na Wen as Agent Melinda May, Brett Dalton as Agent Grant Ward, Chloe Bennet as Skye, Iain De Caestecker as Agent Leo Fitz and Elizabeth Henstridge as Agent Jemma Simmons.
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Image: ABC via Getty Images