Marvel's Agents of S.H.I.E.L.D. wraps up the first half of Season 1 with "The Bridge", airing Tuesday, December 10 at 8 PM ET on ABC. The network has released the first promo for the midseason finale, which features J. August Richards as Mike Peterson from the "Pilot" episode, who returns as a new S.H.I.E.L.D. agent. We reported last week that this episode features a cliffhanger ending that leads into the second half of the inaugural season on ABC. Check out the video, then take a look at the full plot description.

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, on Marvel's Agents of S.H.I.E.L.D., Tuesday, December 10 (8:00-9:00 p.m., ET) on the ABC Television Network.

Marvel's Agents of S.H.I.E.L.D. stars Clark Gregg as Agent Phil Coulson, Ming-Na Wen as Agent Melinda May, Brett Dalton as Agent Grant Ward, Chloe Bennet as Skye, Iain De Caestecker as Agent Leo Fitz and Elizabeth Henstridge as Agent Jemma Simmons.

Guest starring are J. August Richards as Mike Peterson, Ajani Wrighster as Ace, Ruth Negga as Raina, Rick Malambri as Brian Hayward, Molly McCook as Laura Hayward, Cullen Douglas as Edison Po, Rico Devereaux as prison guard and Albert Marrero Jr. as trainer. "The Bridge" was written by Shalisha Francis and directed by Holly Dale.