Star Trek: The Next Generation Season 6 Episode 12
Stardate: 46424.1. While performing holodeck maintenance, Barclay accesses the stored hologram of Professor Moriarty, who wreaks havoc on board the Enterprise.
Serie: Star Trek: The Next Generation
Director: Alexander Singer
Guest Star: Clement von Franckenstein, Daniel Davis, Dwight Schultz, Majel Barrett, Stephanie Beacham