Premieres Monday, April 30 10/9c
Season 4: Episode 19 - All In
Posted on Apr 11, 2016 03:00am

A mysterious woman who organizes illegal, high-stakes poker games arrives on Holmes and Watson’s doorstep and tells them her life is in danger claiming to be a former associate of Mycroft, Sherlock’s brother. However, as the pair investigates, Joan becomes suspicious that their new client isn’t being truthful.