sergey mikhailovich koltakov (; december 10, 1955 – september 7, 2020) was a russian actor. he was born in barnaul, altai krai, soviet union. he was best known for his roles as sergei in "mirror for a hero" (1987), hank in "new adventures of a yankee in king arthur's court" (1988) and as konstatin in "the life of klim samgin" (1988).