Stardate: 42286.3 Data and Geordi become involved with a holodeck program about Sherlock Holmes and his investigations, when they create Sherlock's arch nemesis, Moriarty; however, modifications to the Moriarty character include the capability of out-smarting Data, which leads to some unexpected consequences.
Elenco: Patrick Stewart , Jonathan Frakes , LeVar Burton , Michael Dorn , Marina Sirtis , Brent Spiner , Gates McFadden , Wil Wheaton , Colm Meaney , Majel Barrett , Whoopi Goldberg , Wil Wheaton .