Aired: December 6, 1988 | Season: 2 | Episode: 3

Overview
Runtime: 46m
Directed by: Rob Bowman
Written by: Brian Alan Lane
Guest stars: Alan Shearman, Anne Ramsay, Daniel Davis
Description
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.