Stevens was an officer aboard the ship that Altman, as well as many other people, were kept on during the retrieving of the Black Marker. He was a psychologist and one of Craig Markoff's right hand men, he also was probably the one who helped create the Krax. He tested people before they went down on a dive to either check on the Marker's progress, take different tests, or check the bathyscapes performance. Everyone who he tested was seen as stable but when they went down went insane under the influence of the Marker. He helped Craig Markoff every step of the way when they were escavating the Black Marker from the Chicxulub Crater in the Yucatán peninsula. He, along with Markoff killed Michael Altman after he (Altman) destroyed the lab and sank the Black Marker with it and used Altman's reports and logs on the Marker to create Markers of their own while they used Altman as the face of Unitology.
- While he appeared to have no interest in the Marker or Unitology at first, he eventually convereted over and convinced Markoff to release Altman from Krax's "playtime" so he could speak to the religious members and help get them settled down.