Sherlock tries to determine who has been killing weak and terminal patients at a hospital, making it look like they died of natural causes. Meanwhile, Sherlock learns more about Joan’s decision to walk away from her surgical career. false 2018-11-02 04:15:14 Colin Bucksey Liz Friedman Liz Friedman 7.7 2012 44 https://www.thetvdb.com/banners/episodes/255316/4395956.jpg 5 1 2012-11-01 srt srt progressive False False 121 255316 4395956