Marvel's Agents of S.H.I.E.L.D. (2013)

S3E14 Watchdogs

A radical faction known as The Watchdogs surfaces with intentions to eradicate the Inhumans, putting Agent Mack and his brother in a dangerous situation. At the same time, Simmons uncovers a potent chemical compound that has the potential to change the future for Inhumans significantly.