Star Trek: The Next Generation - Season 6 Episode 12 -

Diagnosing anomalies in the recreative Sherlock Holmes hologram game programs, Lieutenant Reginald 'Reg' Barclay III discovers protected memory contains the arch-villain character professor James Moriarty, who has become self-conscious and demands fulfillment of a recent promise by the crew that they would think up a way for him to leave the holodeck . To Picard's astonishment, Moriarty proves empirically his will suffices to leave the Holodeck, he even retains a physical body. Picard grants him the benefit of the doubt despite his crimes in fiction, but refuses to ...