Played by Josef Sommer
Charles Esterman is the Deputy CIA Director. Before the World Unity Games, Esterman leaks bionic secrets to Russian General Dzerinsky. This leads to the Russians developing bionic technology, resulting in their first creation of a bionic man - Alan Devlin, whose cover is an OSI agent.
After an assassination attempt on Russian Foreign Minister Yuri Kellagyn by Devlin fails, the cover of Esterman is blown, and he ends up in prison.