Star Trek: Voyager 5.4 - Infinite Regress/Nothing Human

Infinite Regress Encountering the wreckage of a Borg vessel, Voyager picks up a piece of technology which attempts to re-assimilate Seven of Nine, causing personalities from other assimulated victims to possess her uncontrollably, Seven's only hope of survival lies with an alien race intent on destroying Voyager... Nothing Human When B'Elanna is attacked by an injured alien that latches itself onto her body, Voyager's holographic Doctor creates another virtual physician a Cardassian exobiologist to treat her. However, when Torres learns that the physician engaged in unethical wartime medical practices, she refuses the treatment that could save her...