THE ANCIENT SECRETS OF THE MONOLITH ARE REVEALED, ON "MARVEL'S AGENTS OF S.H.I.E.L.D."

Blair Underwood, James Hong and Peter MacNicol Guest-Star

"Purpose in the Machine" - Fitz and the team enlist the aid of an Asgardian to unlock the secrets of the ancient monolith that swallowed Simmons, and Agent May is at a crossroads in her personal and professional life, on "Marvel's Agents of S.H.I.E.L.D.," TUESDAY, OCTOBER 6 (9:00-10:00 p.m., ET) on the ABC Television Network.

"Marvel's Agents of S.H.I.E.L.D." stars Clark Gregg as Director Phil Coulson, Ming-Na Wen as Agent Melinda May, Brett Dalton as Grant Ward, Chloe Bennet as Agent Daisy Johnson, Iain De Caestecker as Agent Leo Fitz, Elizabeth Henstridge as Agent Jemma Simmons, Nick Blood as Agent Lance Hunter, Adrianne Palicki as Agent Bobbi Morse., Henry Simmons as Agent Alphonso "Mack" Mackenzie and Luke Mitchell as Lincoln Campbell.

Guest starring Blair Underwood as Dr. Andrew Garner, Peter MacNicol as Professor Elliott Randolph, Daz Crawford as Kebo, Spencer Treat Clark as Alexander, Alex Hyde-White as Lord Thornally, Daniel J. Wolfe as Lord Manzini, Piers Stubbs as younger lord, James Hong as William May and Darius Cottrell as Moe.

"Purpose in the Machine" was written by DJ Doyle 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. This program carries a TV-PG,V parental guideline.

For more information on "Marvel's Agents of S.H.I.E.L.D.," visit ABC.com