Lethal White

London, the summer of the 2012 Olympics. Billy Knight, a young man with a mental illness, bursts into the agency saying he saw a child strangled. Soon after, Culture Minister Jasper Chiswell hires Strike: he's being blackmailed by Billy's brother Jimmy and by Geraint Winn. Robin, stuck in an unhappy marriage, goes undercover in Parliament as Venetia Hall. Chiswell is found dead with a bag over his head and pills in his juice, and police call it suicide. Strike ties the death to the minister's family and proves the killer is his son, Raphael, helped by his stepmother, Kinvara. Raphael traps Robin on a boat before he's caught. She learns Matthew is cheating with Sarah and leaves him.

1. ChangeTwice the screen time

   At nearly twice the length of the earlier books, Lethal White was the first to get four episodes instead of two or three.

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2. ReferenceA horse term

   "Lethal white" is a genetic syndrome that kills foals soon after birth. The Chiswells' horses sit at the heart of the story.

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3. ReferenceThe hillside horse

   The Uffington White Horse, the giant figure cut into an Oxfordshire chalk hill, is one of the clues tying the Knights to the Chiswells.

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