6. An Unnatural Arrangement

Complete story — includes the ending

An intruder invades Captain Gregson's home, terrorizing his wife and asking where he can find her husband. She shoots him, and he flees. Later, two murder victims surface, including Gregson's neighbor Lieutenant James Monroe. The killer went to the wrong house (due to a Google Maps error) and is not actually after Gregson. The victims were assigned to guard an archaeological site. Beth Roney, the archaeologist in charge, stole artifacts from the dig and is now killing her accomplices. Sherlock and Joan remember seeing a valuable bowl, one of a set found at the site, in Roney's home, but when they search her place the next day, it is gone. Sherlock realizes that her ex-husband took it. After being told of evidence incriminating him, the ex-husband confesses and implicates Roney. During the course of the investigation, Gregson is forced to reveal that his wife initiated a trial separation. He becomes angry after learning that she has been seeing another man. However, Gregson does not want to give up, gifting her a dog and apologizing for always putting the job before their marriage. Meanwhile, Sherlock gives Joan access to his box of unsolved cases.