The first clip from Marvel’s Agents of S.H.I.E.L.D.’s return has surfaced and it’s a bit of a mind-bender as Director Coulson consults with Agent Fitz about Lincoln. And what lurks behind that secret door…? Check out the clip after the break. Marvel’s Agents of S.H.I.E.L.D. returns on Tuesday, March 8th (8/7C).