Star Trek: Voyager - Dark Frontier -

During the mission, the Borg Queen (played by Susanna Thompson) contacts Seven of Nine, offering her a choice: rejoin the Collective or watch Voyager be assimilated.

Captain Janeway organizes "Operation Fort Knox," a tactical raid on a Borg vessel. The crew trains extensively on the holodeck to perfect the retrieval of a transwarp coil. Star Trek: Voyager - Dark Frontier

"Dark Frontier" provides the most comprehensive look at how Annika Hansen became Seven of Nine. During the mission, the Borg Queen (played by

Seven seemingly abandons Voyager to save the crew, but Janeway refuses to leave her behind. Using the Delta Flyer , Janeway leads a rescue mission into the heart of Borg space (Unimatrix One) to bring Seven home. Borg Lore & Backstory During the mission