Marvel's Agents of S.H.I.E.L.D. Season 2 Spoilers: Major Scoop on Alien City

Last week's Season 2 episode of Marvel's Agents of S.H.I.E.L.D., "The Writing on the Wall," finally solved the mystery of the alien carvings Coulson had been sketching for months. The circles and lines were actually a map to a city, one that S.H.I.E.L.D. and Hydra are now racing to find. But who will find it first?

Somewhat surprisingly, the official description for Episode 9, entitled "...Ye Who Enter Here," reveals that information, along with the predicament of a returning character.

"'...Ye Who Enter Here' - SHIELD discovers the ancient city before Hydra, but uncovering the secrets may require one of Coulson's team to make the ultimate sacrifice. Meanwhile, May and Skye race to get to Raina before Whitehall takes her, on TUESDAY, DECEMBER 2 (9:00-10:00 p.m., ET) on the ABC Television

'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 Grant Ward, Chloe Bennet as Skye, Iain De Caestecker as Agent Leo Fitz, Elizabeth Henstridge as Agent Jemma Simmons and Nick Blood as Lance Hunter.

Guest starring are B.J. Britt as Triplett, Adrianne Palicki as Bobbi Morse, Henry Simmons as Alphonso 'Mack' Mackenzie, Ruth Negga as Raina, Patton Oswalt as Sam/Billy Koenig, Reed Diamond as Daniel Whitehall, Jeffrey Corbett as Chad, and Brittnee Garza as Cashier.

'...Ye Who Enter Here' was written by Paul Zbyszewski and directed by Billy Gierhart."

What do you think of the description for "...Ye Who Enter Here"? Let us know in the comments section.