When you watch Elementary Season 4 Episode 15 online, an old woman falls to her death, accidentally crushing a pedestrian on the sidewalk below. At first blush, it seems like a senile senior accidentally wandered off her balcony, but Sherlock quickly deduces that she could not have moved the ottoman to the balcony, and furthermore, her arthritis pills had been switched out for pills that made her come across as suffering from dementia. The matter grows even odder when they learn that she left her entire estate to her beloved Shih Tzu. Once they interview the victim's son, however, they realize that her entire estate will be tied up in legal challenges for years. So who would have motive to kill the old woman? And what does it have to do with a proposed skyscraper planned nearby? There's a lot of mystery but not a lot of answers to be had. Joan, meanwhile, runs into Gregson and his girlfriend of a year at a restaurant. Following the encounter, however, the girlfriend breaks up with Gregson because she claims that she did not want to hurt his career. Joan, however, is suspicious and decides to investigate further. Find out more by watching Elementary Season 4 Episode 15 online!