Mark Dexter. Actor: Industry. Mark Dexter is a British actor, classically trained at the Royal Academy of Dramatic Art in London. Dexter's early successes were on stage, in particular with two high-profile productions of Tennessee Williams plays, beginning with Sam Mendes' 1995 Olivier Award winning production of The Glass Menagerie at the Donmar Warehouse, in which he played The Gentleman Caller. Since then, Dexter has moved primarily into film and television....