Someone is out to turn off the lights -- literally -- in the third episode of "Agents of S.H.I.E.L.D.'s" fourth season. And to paraphrase what your old man probably told you as a teenager -- nothing good happens in the dark.

In anticipation of the episode, ABC and Marvel have released a new promo. Check it out below:

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A global blackout? A city on edge? And lives on the line? This does not bode well for Marvel's top agents. Plus, a shadowy figure looks to have something up its sleeve, and Coulson is concerned that someone has just declared war on the Inhumans...which is awkward when your new boss is one.

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"Agents of S.H.I.E.L.D.'s" "Uprising" airs Tuesday, October 11, at 10pm ET on ABC.