Wednesday?s episode of ?Underground? will mark star Christopher Meloni?s directing debut on the WGN American show. ?It was everything you hoped not to happen and more,? the star joked. The 10-episode second season of the Underground Railroad drama follows our heroes in a divided America on the brink of civil war, each side vying to enact their own justice, where Rosalee (Jurnee Smollett-Bell) is now working alongside Harriet Tubman (Aisha Hinds) in helping runaway slaves escape to the North.