Ranek was a Lokirrim starship captain whose mission was to find and deactivate photonic insurgents. When he encountered the Delta Flyer with the Doctor aboard, he demanded the ship surrender. In order to protect the Doctor, Seven of Nine downloaded his program into her cortical implant. This allowed the Doctor to control her body and experience the full range of human sensations. While the Doctor thus controlled Seven, Ranek developed an attraction to her.
Ranek was severely injured during an attempt by the USS Voyager to rescue its crew members. The Doctor, released from within Seven's implants, was able to operate on Ranek and save his life. (VOY: "Body and Soul")
- Ranek was played by Fritz Sperberg.