A teaser for the seventh and final season of ABC's Agents of S.H.I.E.L.D. has premiered at Disney's D23 Expo.
Here's the teaser, which flashes back to the 1930s - and invokes the sign of Hydra:
Those weird 30s aliens are Chronicoms - Sarge's people - and they'll be some of the main villains of the show's final season.
"The Chronicoms see us as their main threat. We felt like going back was a way for us to reflect on our history, the history of S.H.I.E.L.D., and our show and our people, as we gear up for the end of all of it," showrunner Jed Whedon told Marvel.com
following the season 6 finale. "Having an enemy that’s focused on us helps us build story that allows our characters to reflect on themselves and each other."
No premiere date for Agents of S.H.I.E.L.D. season 7 has been announced.