"Watchdogs" is the fifty-eighth episode of the ABC/Marvel series Agents of S.H.I.E.L.D.. It aired on March 29, 2016.
Synopsis[]
When a radical group called the Watchdogs emerges with plans to eliminate the Inhumans, Mack and his brother Ruben become caught in the crossfire. Meanwhile, Simmons discovers a powerful chemical compound that could alter the future for Inhumans.
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