Chekov was the navigator on the original U.S.S. Enterprise under the command of James T. Kirk. An only child, his youthful career was so full of brash pronouncements of Russian ethnic pride and accomplishments he became a good-natured joke among his superiors.

Although he was always a promising officer with a career to bear it out, the young Chekov was prone to hot-heated actions and romantic attachments. While attending Starfleet Academy his involvement with fellow cadet Irina Galliulin broke off when she dropped out of the service before graduation in disdain for its structure. Years later they met again when she and other Eden-seekers with Dr. Sevrin were aboard.

Following the end of his first five-year mission, Chekov was promoted to lieutenant when he was assigned as security chief aboard the refit U.S.S. Enterprise. 

Walter Koenig — actor, director, screenwriter, novelist, acting professor, and comic book creator — was born in Manhattan in 1936 to Lithuanian Russian Jewish parents.

Bitten by the acting bug early in his youth, Koenig studied at the Neighborhood Playhouse in New York where he worked with fellow students James Caan, Elizabeth Ashley, and Dabney Coleman. His stage career spans 30 years and includes stops in New York, Chicago, Los Angeles and many other cities. He appeared in many plays and television shows of the late 1950s and early 1960s, including the Mr. Novak series, and even produced and wrote his own feature film in 1967, "I Wish I May." In 1967 he landed the role of Ensign Pavel Chekov in the original "Star Trek" series.

Koenig has also appeared as Chekov in the first seven of the big screen "Star Trek" films and played the recurring character of Alfred Bester in the TV series "Babylon 5." Aside from his role in "Star Trek", he has appeared in 40 different TV series and television movies, including "Anthony and Cleopatra" starring Timothy Dalton and Lynn Redgrave.

A natural writer, Koenig has written for the television shows "Family", "Matthew Starr", "Land of the Lost", "Class of '65" and others. His first book, "Chekov's Enterprise," which recounts the making of the first "Star Trek" movie, was published in 1979. He has also written a satiric fantasy novel, "Buck Alice and the Actor-Robot," and a three-part comic book series entitled "Raver." Koenig wrote and performed a one-character piece entitled "You're Never Alone When You're A Schizophrenic," which was a finalist in the 1996 New York Film Festival Awards. While not a member of the cast during the "Star Trek" animated series, he did pen one of the episodes, "The Infinite Vulcan." His autobiography "Warped Factors : A Neurotic's Guide to the Universe" was published in 1998.

In a 1997 internet poll of favorite television bad guys, Koenig was the top choice of 12,000 voters for his role as Alfred Bester on "Babylon 5." He was also voted the favorite guest star on "Babylon 5."

Koenig and his wife Judy Levitt have two children and live in Los Angeles.

Biographies derived and edited from the Official Site.