Nathan Stark was a Nobel prize winning mathematician who was appointed Director of Research at Global Dynamics following Warren King's dismissal. Cool, calm and calculating, Nathan commanded Eureka's operations with severe efficiency, but gave free rein and authority to GD's scientists, allowing their projects to get out of hand fairly quickly, forcing Jack Carter (Eureka character) to step in and save the day. Nathan used his authority to ensure there would be no lasting consequences. Carter and Nathan, as a result, quickly became at odds.