who are the agents of this organization?
It is led Nick Fury as executive director. He reports to a twelve-member council, whose identities even he does not know.
S.H.I.E.L.D.
Usually led by Nick Fury as executive director (although he reports to a twelve-member council, whose identities even he does not know), this organization often operates as much as a covert agency as a quasi-military one, initially depicted as affiliated with the United States government. Later, S.H.I.E.L.D. was depicted as under the jurisdiction of the United Nations, with vast technological resources at its disposal, with U.N. General Assembly Resolutions and legislation passed in signatory nations aiding many of their operations. However, S.H.I.E.L.D. has been inconsistently portrayed as under U.S., rather than U.N., control - for instance, in "Astonishing X-Men" #3, Nick Fury explains S.H.I.E.L.D.'s inaction during an incident of genocide by stating that it did not occur on American soil.

how many episodes are in season 4 of agents of shield 22 what is this series based on? It is based on the Marvel Comics organization S.H.I.E.L.D., a peacekeeping and spy agency in a world of superheroes.
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S.H.I.E.L.D. [SEP] Fictional organizational history
Usually led by Nick Fury as executive director (although he reports to a twelve-member council, whose identities even he does not know), this organization often operates as much as a covert agency as a quasi-military one, initially depicted as affiliated with the United States government. Later, S.H.I.E.L.D. was depicted as under the jurisdiction of the United Nations, with vast technological resources at its disposal, with U.N. General Assembly Resolutions and legislation passed in signatory nations aiding many of their operations. However, S.H.I.E.L.D. has been inconsistently portrayed as under U.S., rather than U.N., control - for instance, in "Astonishing X-Men" #3, Nick Fury explains S.H.I.E.L.D.'s inaction during an incident of genocide by stating that it did not occur on American soil.