In the final show of the current season: a rare interview with double Oscar-winning actor, screenwriter and director Denzel Washington; TV's toughest task-masters, Dragons' Den stars Deborah Meaden, Theo Paphitis, James Caan and Peter Jones are in the studio; provocative movie maverick Quentin Tarantino makes an exclusive appearance; and there is chat and music from born-again 80s supergroup a-ha.