In the Atlantic Theater's production of Lucy Thurber's new drama Bottom of the World, a young woman looks toward the last novel written by her recently deceased sister for closure. Sounds like a heavy show, but Broadway.com caught up with the cast while in rehearsals to discuss how, thanks to the involvement of bluegrass music, the show is a surprising tale of hope and strength prevailing during even the darkest of times. Dive down deep with the playwright, director and stars Crystal A. Dickinson, Kristin Griffith and Brandon J. Dirden.