With Atwell set to star in her own eight episode Agent Carter series during Agents of S.H.I.E.L.D. mid-season hiatus, you have to imagine that this will be some sort of flashback which helps set up the show.
As well as Atwell and the lead actors, the confirmed cast list includes a guest appearance from journalist George Stephanopoulos as himself, B.J. Britt as Agent Antoine Triplett, Nick Blood as Agent Lance Hunter, Adrian Pasdar as Brigadier General Glenn Talbot, Henry Simmons as Alphonso “Mack” Mackenzie, Patton Oswalt as Agent Billy Koenig, Lucy Lawless as Isabelle “Izzy” Hartley, Wilmer Calderon as Idaho, Reed Diamond as Daniel Whitehall, Brian Patrick Wade as Carl Creel, Matthew Glave as Roger Browning, Simon Kassianides as Sunil Bakshi, Raquel Gardner as Carla Talbot, Ben Turner Nixon as Hydra Officer, Franco Vega as Military Leader, Rich Ceraulo as Soldier #1, and JB Tadena as Private Tilden.
There are some familiar faces in there from last year, while comic book fans may recognise the name Carl Creel as the villain known as The Absorbing Man. He’s sure to cause Coulson and his team some problems!
The episode will be called “Shadows”, and the official description gives us an idea of where we’ll be picking up with the characters this year. “Coulson and his team are now wanted fugitives with limited resources–but that’s not stopping them from keeping the world safe from powerful and unseen threats everywhere. However, with new members they hardly know, will S.H.I.E.L.D. ever be trusted again?”