Logan St. Clair (played by Zoe McLellan) was only in one episode of the series "Double Cross", but was very popular among fans. Logan St. Clair was a double of Quinn's who was female, but other than a difference between an X and Y chromosome, Quinn and Logan have identical genetics. Logan discovered that she and Quinn are doubles when she noticed they had identical bio-thermal heat prints. Logan comes from a world where natural resources are scarce: people shower together to save water; people eat a green substance called "geo-mash" as food; power-outages are regularly scheduled to save electricity.