In response to a distress signal, Commander Chakotay lands his shuttlecraft on a planet's surface but is viciously attacked. He's swiftly rescued by a colony of formerly assimilated Borg and goes to extreme measures when he allows their resident scientist, Dr. Riley Frazier, to heal his neural injuries by linking him to a remnant of the Borg Collective consciousness.

Lori Hallier (Dr. Riley Frazier)
Ivar Brogger (Dr. Orum)
Susan Patterson (Ensign Marie Kaplan)

• Ensign Kaplan (who also appeared earlier this season in "Future's End" Parts 1 and 2) is killed.
  
• The Borg cube was destroyed by an electro-kinetic storm. The surviving Borg who escaped to the planet were severed from the Collective. After the link was severed, the colony fell into chaos. They manipulated Chakotay into reactivating the neural generator on the Borg cube to re-link the colonists into a new collective. After the link is established, they destroy the cube to prevent their discovery by the Borg.
  
• Riley was assimilated at the Battle of Wolf 359 while serving as science officer on the U.S.S. Roosevelt. (See TNG episode "The Best of Both Worlds, Part II" and DS9 episode "Emissary".)