Walter Koenig: Walter Koenig. Actor: Star Trek. Walter Koenig began his acting career in 1962 as an uncredited Sentry in the TV series Combat! (1962), and in the following few years had bit roles in several television shows, until he landed the role that would catapult his career in ways he could never have imagined, as Ensign Pavel Chekov in Star Trek's Original Series (Star Trek (1966)). He went on to reprise...
