Dr. John Watson (Morris Chestnut) is about to meet Lestrade — but in the CBS drama, this character is not a detective inspector with Scotland Yard or male, like in the Sherlock Holmes stories written by Arthur Conan Doyle. Rachel Hayward will guest star as Detective Lestrade, who’s with the Pittsburgh Police, TV Insider has learned exclusively. She appears in the April 20 episode, “The Man with the Alien Hand,” of Watson, and we also have the first look photos of her at her desk and with Watson (above and below). Sergei Bachlakov / CBS In this episode, the 10th of the season, Watson is thrown into a detective case when he is unsure whether the patient he is treating for one of the rarest ailments in the world, Alien Hand Syndrome, is guilty of pushing his brother in front of a bus to his death. “When Watson comes to believe that...