S.H.I.E.L.D.

Summary of Organization
S.H.I.E.L.D. is a fictional espionage and law-enforcement agency in the Marvel Comics Universe. Created by Stan Lee and Jack Kirby in Strange Tales #135 (Aug. 1965), it often deals with superhuman threats.

The acronym originally stood for Supreme Headquarters, International Espionage, Law-Enforcement Division. It was changed in 1991 to Strategic Hazard Intervention Espionage Logistics Directorate.

Within the various films set within the Marvel Cinematic Universe, the acronym stands for Strategic Homeland Intervention, Enforcement and Logistics Division.

Season 1

 * Episode 24 ArThor: Captain America appeared asking Arthor to join shields like him. Arthor didn't understand that he didn't need shields to join. In the end, he got joined by Phil Coulson.

Season 2

 * Episode 2 (28) Captain America's Got Talent: The men (Nick Fury, Phil Coulson, and Iron Man) appeared at S.H.I.E.L.D headquarters to finally assemble the Avengers.