When Seven begins to exhibit mega-personalities (from those who were absorbed by the Borg), her life is in danger. It happens when a Borg device nears Voyager. The problem is an aliens species that has every right to get revenge on the killer bees, and the doctor's inability to curtail the problem. There is some of the usual tenuous science (or lack of it), but it is entertaining. We get to see Seven begin to appreciate the efforts of the crew, putting their own lives on the line. One positive is that it is a logical step to imagine that Seven is filled with all the details of the collective and its victims.
Review of Infinite Regress
