Star Trek: The Next Generation

Elementary, Dear Data (2x3)

Air date: Dec 05, 1988

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.