With a title reminiscent of Isaac Asimov's "I, Robot", the Borg are back in another smart 5th season episode! Well, to be more specific, ONE Borg is back. This episode concerns the Enterprise answering a distress call from a new and strange planet, where one young Borg (designation: 3rd of 5) survived the crash landing of his craft.
Despite the risk, Picard (who is reliving his own experiences about turning into Locutus in "The Best Of Both Worlds" over a year ago) decides to beam up the injured Borg, and Dr. Crusher is able to save him. Disconnected from the Borg, this one, which has been named Hugh, starts developing an individual identity and emotions.
At the same time, Picard and crew devise a plan to introduce a virus into Hugh to spread to the others in the collective, thereby shutting them down permanently (a plan that is used in the end episode of Star Trek: Voyager). Also, Guinan must confront her own hatred of the Borg (due to her people dying at the hands of the Borg) when she encounters Hugh.
Trivia note: we see Picard's love of fencing again, but this time with Guinan (played by Whoopi Goldberg).