With the country on the brink of Civil War, the struggle for freedom is more dangerous than ever. Underground tells the story of American heroes and their harrowing journey to freedom, with legendary Harriet Tubman blazing the trail. Written by WGN America

A young, fresh-faced Hill staffer gets her first job in Washington, D.C. to discover two things: The government has stopped working, and alien spawn have come to earth and eaten the brains of a growing number of Congressmen and Hill staffers.