Entertainment Weekly has posted the first photo of Adrianne Palicki as Bobbi Morse/Mockingbird in the October 21 episode of "Agents of S.H.I.E.L.D." and her role will come as somewhat of a surprise -- she's the head of security for Hydra. Palicki was announced as cast in August, but the character was teased during the "Agents of S.H.I.E.L.D." panel at Comic-Con International 2014 in a special debriefing teaser starring Patton Oswalt as Agent Billy Koenig.
Considering how the character was referred to at Comic-Con, it's unlikely that Bobbi Morse is actually working for Hydra. The chances that she's undercover infiltrating Hydra while still on Coulson's side helping to rebuild S.H.I.E.L.D. is actually pretty high -- but no further details about the character or her circumstances were released. Although, the title of the episode, "A Hen in the Wolf House," is admittedly pretty telling.
Palicki will appear on "Agents of S.H.I.E.L.D." October 21.