Coulson's captured, HYDRA is weaponizing Inhumans, and they're locked up in an "impenetrable" castle. That's the quick and dirty coming out of a new clip from Tuesday's Agents of S.H.I.E.L.D. midseason finale. Titled "Maveth," take a look:
The "Maveth" episode of Agents of S.H.I.E.L.D. airs December 8 on ABC.