When the Enterprise crosses the neutral zone to touch dongles with another Galaxy-class ship, it soon becomes infected with a computer virus that threatens to kill everyone onboard. But rather than "turn it off, then turn it on," the crew troubleshoots the problem by doing a little light archaeology. Did the USS Yamato get infected by Nagilum? Does Wesley (the boy?) have a direct line to Captain Picard? What is a "Dirty Data"? It's the episode broadcast to you from Shimoda Corner!