British actress Keira Knightley says her new series ‘Black Doves’ stands out for its wry take on the world of espionage. She also said that while ‘it’s a thriller, it has an amazing wit. It’s slightly ridiculous, but in the most delightful way.’ Knightley, who was also an executive producer on the show, plays Helen Webb, an undercover spy working for the secretive intelligence organisation “Black Doves”.