The two scientists featured are named Amanda and Samantha. Amanda Tapping, who directed the episode, played Samantha Carter in Stargate.
Christopher Heyerdahl and Amanda Tapping were regulars on Sanctuary. Amanda Tapping directed this episode as she has many episodes in the series Tapping and Heyerdahl also shared screen time in Stargate Atlantis, where Tapping played Col. Samantha Carter, and Heyerdahl played Todd the Wraith.