It begins with the assassination of a skittish civil servant, who may or may not have found out something about the mysterious recent death of the Chinese ambassador to the UK. Sniped on the South Bank — in a glittering,

When we are first introduced to Helen Webb ( Keira Knightley ), the protagonist of Netflix's newest spy thriller, "Black Doves," she dons a nice dress and perfectly coiled hair that doesn't move an inch.