Video: Downton Abbey season 4, full trailer The full trailer for the highly anticipated fourth series of Downton Abbey has been released. In the 70-second trailer we see Lady Mary (Michelle Dockery) still mourning for her husband Matthew Crawley (Dan Stevens) who died in the Christmas episode. Lady Mary is in conversation with her grandmother, the Dowager Countess (Dame Maggie Smith) who tells her: "You must choose either life or death." We also see glimpses of new characters including jazz musician Jack Ross (Gary Carr) and Mr Green (played by former EastEnder Nigel Harman), a valet with no redeeming qualities. The new series of Downton Abbey starts on Sunday September 22nd on ITV.