When the U.S.S. Enterprise sets out to repair the Argus Array, a telescope that has stopped relaying data for two months, the crew discovers an alien probe near the telescope. Geordi takes Barclay, a notoriously shy crew member, to investigate. As they near the probe, it emits an energy surge that knocks Barclay unconscious, and he and Geordi are transported to Sickbay. Meanwhile, the probe begins to follow the Starship, emitting a dangerously high energy level. When the crew is unable to evade it, Barclay amazes everyone by taking charge of the situation and eliminating the probe, saving the ship from destruction.
