"Infinite Regress" is the 101st episode of Star Trek: Voyager, the seventh episode of the fifth season. The show depicted a Starfleet spacecraft slowly making its way back to Earth after being stranded in the Delta Quadrant. This science fiction story focuses on the character Seven of Nine (played by Jeri Ryan) and the Borg aliens. Background The Borg, a Star Trek villain species famous for their phrase "resistance is futile," was introduced on Star Trek: The Next Generation in the episode "Q Who?" (S2E16) and also featured in the critically acclaimed episode "The Best of Both Worlds". They made a major influence on Voyager starting with "Scorpion", which introduced the ex-Borg character Seven of Nine to the main cast, and there were many Borg-centric episodes since that time in the show; they return with a major story once again as Seven of Nine struggles with her Borg past in "Infinite Regress". The episode was directed by David Livingston. Livingston directed many Star Trek episodes in this era, including for Star Trek: The Next Generation (1987-1994), Star Trek: Deep Space Nine (1993-1999), Star Trek: Voyager, and Enterprise. Overall he directed 62 episodes of Star Trek, including 28 for Voyager. Plot Continuing on course for home, Voyagers long-range sensors detect a debris field from a Borg cube. The crew decides to alter course to avoid the debris, since the Borg tend to salvage materials and parts from their vessels, and may return to the area. As their general course takes them closer to the Borg vessel's debris field, Seven begins experiencing a form of multiple personality disorder and alternate personalities begin to manifest themselves. After several incidents witnessed by the crew, she is taken to Sickbay to try to find the source of the neurological problem. Seven speculates that it could be due to an active and undamaged vinculum (transponder device) still in the debris field from the Borg vessel. Voyager alters course to retrieve the vinculum and investigate further. Once at the debris field, they find the vinculum, still active, and beam it aboard for inspection. Further scans reveal a synthetic pathogenic virus inhabiting it. After reviewing a number of data cubes, they deduce that the virus must have been introduced by the Borg cube's last assimilation, a small vessel carrying aliens referred to by the Borg as Species 6339. Voyager searches out these alien travelers, who reveal their attempt