Dr. Ternovsky, Nikolai (also spelled Mikolai, or Mikolaj[rn 1]) is a Russian cosmonaut aboard The Leonov, who serves as the Control & Guidance officer in Arthur C. Clarke’s 2010: Odyssey Two and the 1984 film adaption. He is played by Victor Steinbach.
Dr. Ternovsky conducts Engineering-Control Systems diagnostics onboard the Cosmonaut Alexei Leonov during the joint Soviet/USA Jupiter Mission. Its mission is to investigate Discovery and the Jovian Monolith by 2010. Ternovsky specializes in computers, and works with Dr. Chandra to reactivate HAL.