Seven of Nine's latent memory of being attacked prompts an intense investigation.
4-11: Concerning Flight
When Voyager seeks to recover stolen supplies, Janeway receives help from the holographic version of Leonardo da Vinci, who is using The Doctor’s pirated mobile emitter.
4-02: The Gift
As Voyager limps out of Borg space, Kes undergoes a dramatic transformation and a unique new member joins the crew.