Following a winter hiatus, "Agents of S.H.I.E.L.D." is back with a new storyline titled "L.M.D." Last night's premiere episode was packed with twist after twist, including new information about the Darkhold and Senator Nadeer.

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ABC has aired a look at next week's episode, which is titled "The Patriot." That title, of course, is potentially a nod to Director Jeffrey Mace -- a character that has superhero ties of his own in the source material. In addition to further teasing May's conflict, the promo also hints at developments when it comes to Jason O'Mara's character.

THE PATRIOT - Coulson and Mack discover a shocking secret about Mace, which leaves all of S.H.I.E.L.D. in a dangerous position.

Guests: Jason O’Mara, Mallory Jansen, Adrian Pasdar, Maximilian Osinski, Patrick Cavanaugh, Troy Caylak, Kimberley Drummond, Shelly Robertson, Alastair Bayardo

Airing Tuesdays at 10 pm ET/PT on ABC, "Marvel's Agents of S.H.I.E.L.D." stars Clark Gregg as Agent Phil Coulson, Chloe Bennet as Daisy "Quake" Johnson, Ming-Na Wen as Melinda May, Iain De Caestecker as Leo Fitz, Elizabeth Henstridge as Jemma Simmons, Henry Simmons as Alphonso "Mack" Mackenzie and more.