'Agents of SHIELD' 'The Bridge' promo: J. August Richards' Mike Peterson returns

"Marvel's Agents of SHIELD" is already circling back on itself. The series' 10th episode, which will air on Dec. 10, will mark the return of J. August Richards' character Michael Peterson.

Peterson was introduced in "Pilot" as a down-on-his-luck man who turned to the evil organization Centipede for help in becoming super. He ended up going evil while trying to be a hero before SHIELD subdued him, and it seems he's allied himself with their cause in the time since. Maybe.

The new promo for episode 10, "The Bridge," seems to imply that Peterson's loyalties might not be what they at first appear. Could he still secretly be allied with Centipede? And how will he respond to seeing Coulson, Skye, May, Ward and FitzSimmons again?

Centipede will be a focus in "The Bridge," as Ruth Negga's Raina is listed as an episode guest star. The synopsis for the episode reads, "In a shocking cliffhanger episode. Coulson takes the war back to Centipede, and this time he brings in Mike Peterson for some super-soldier support. As they get closer to the truth, startling secrets are revealed and an unexpected twist threatens the team."

"The Bridge" will be "Agents of SHIELD's" first two-part episode, so don't expect to have all the answers revealed on Dec. 10. The ABC series will return after a week break and air at 8 p.m.

Photo/Video credit: ABC