SpoilerTV Image Archive | Gallery | Elementary | Season 4 | Promotional Episode Photos | Episode 4.19 - All In | "All In" -- 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, on ELEMENTARY, Sunday, April 10 (9:00-10:00 PM, ET/PT) on the CBS Television Network. Pictured Lucy Liu as Joan Watson Photo: Michael Parmelee /CBS é2016 CBS Broadcasting Inc. All Rights Reserved.
