Coulson is out, and Jason O'Mara's mystery character is in. Agents of SHIELD officially has a new director.

Season 3 closed out with a six-month time jump, one that ousted Coulson (Clark Gregg) from his role as the agency's helmsman. The sting left fans wondering who would fill he vacancy, and Marvel has finally pulled back the curtain on the new director. Well, half way, at least.

Jason O'Mara will join the cast as the unnamed director, taking on a role whose Marvel roots date back to the 1940s.

"Bringing Jason into the mix as the New Director of S.H.I.E.L.D. forces everyone, particularly Coulson, to reevaluate their role in the Agency," executive producer Jeph Loeb explained. "Jason has both the physical presence and acting dynamics that will connect with and challenge even the most loyal agent."

We know one thing for sure, however - O'Mara's character will not come from SHIELD's rank and file. The agency is back under the auspices of the government, and that means an entirely new agenda for the beleaguered defenders.

"It seems to me that, in the wake of Civil War and the Sokovia Accords, that some kind of organization is officially needed to deal with Inhumans and powered people, enhanced people," Gregg told EnStars at San Diego Comic-Con. "Once SHIELD comes out of the shadows and is under government control, I suspect the government will have a desire about who they put in that position. It probably won't be a career SHIELD agents like old Philip Coulson."

Who do you think O'Mara will play? Sound off in the comments below!

Agents of SHIELD will return to ABC this fall. Click the video below to see the final moments of the season 3 finale.