COULSON DISCOVERS A SHOCKING TRUTH ABOUT DIRECTOR MACE, ON ABC'S 'MARVEL'S AGENTS OF S.H.I.E.L.D.'

"The Patriot" - Separated from their team, Coulson and Mack discover a shocking secret about Mace, leaving all of S.H.I.E.L.D. in a precarious position, on "Marvel's Agents of S.H.I.E.L.D.," TUESDAY, DECEMBER 17 (10:00-11:00 p.m. EST), 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, Chloe Bennet as Daisy Johnson, Iain De Caestecker as Agent Leo Fitz, Elizabeth Henstridge as Agent Jemma Simmons, Henry Simmons as Agent Alphonso "Mack" MacKenzie and John Hannah as Holden Radcliffe.

Guest starring are Jason O'Mara as Director Jeffrey Mace, Mallory Jansen as Aida, Adrian Pasdar as Brigadier General Glenn Talbot, Maximillian Osinski as Agent Davis, Patrick Cavanaugh as Burrows, Troy Caylak as Yuri Zaikin, Kimberley Drummond as Agent Crawford, Shelly Robertson as Michelle Caldwell and Alastair Bayardo as Agent McCafferty.

"The Patriot" was written by James C. Oliver & Sharla Oliver and directed by Kevin Tancharoen.

"Marvel's Agents of S.H.I.E.L.D." is broadcast in 720 Progressive (720P), ABC's selected HDTV format with a 5.1 channel surround sound. A TV parental guideline will be assigned closer to the airdate.