Marvel.com has released the Agents of S.H.I.E.L.D. Season 4 cast portraits, including a couple of possible new regulars.

Check out the Agents of S.H.I.E.L.D. Season 4 cast portraits in their blue-hued backdrops. You’ll notice that two characters that were introduced in season 3 have their own portraits as well. We can be safe to assume that John Hannah‘s Holden Radcliffe and Natalia Cordova-Buckley‘s Elena ‘Yo-Yo’ Rodriguez will be regulars, at least for the season.

The season 4 premiere of Agents of S.H.I.E.L.D. will air this Tuesday, September 20th on ABC.

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