A Ferengi captain is on a mission of vengeance. He contacts the Enterprise, hailing Picard as a hero, and returning a ship that was in an historic battle nine years previously. Interestingly, a Ferengi ship was destroyed by Picard, so what's going on. The Ferengi, being consummate businessmen, are acting strangely, offering the ship to Picard. Meanwhile, Picard begins suffering debilitating headaches that have no obvious source. During the events that follow, it is obvious that the Ferengi captain is causing all this. It appears that he needs to change history for some reason, making Picard appear a coward. This is an interesting episode although the science is suspect. So often we have to accept machines, allowing our skepticism to subside. The Ferengi captain has conveniently created an orb that can affect the human brain. No one ever explains how he does this. Anyway, the table is set and the villains are in place. Go along for the ride. A decent enough episode.