"Six By Sondheim" is a new HBO documentary that takes a look at the life and art of musical theatre legend Stephen Sondheim through six of his iconic songs. Directed by Tony winner James Lapine, the film contains archival footage as well as new musical segments directed by Todd Haynes, Autumn de Wilde and Lapine. In this special extended peek at the film (courtesy of HBO), Darren Criss, Jeremy Jordan and America Ferrera are featured in a brand new performance of Merrily We Roll Along's "Opening Doors" created especially for the film. "Six By Sondheim" debuts Dec. 9 on HBO.