In this week's episode, Grace and Olivia discuss the murders committed by Russian serial killer, Alexander Pichushkin, better known in the west as the Chessboard Killer. He was convicted for 48 murders but is suspected by many to have committed at least 60. Pichushkin earned his moniker after he claimed his goal was to kill 64 people, the number of squares on a chessboard. However, he later recanted that statement.