Walter Marvin Koenig is an American actor, writer, teacher and director, known for his roles as Pavel Chekov in Star Trek and Alfred Bester in Babylon 5. He wrote the script for the 2008 science fiction legal thriller InAlienable.
What if Doctor was American? The first doctor (1963-1966)
The adventures in time and space of the Doctor, a Time Lord who changes appearance and personality by regenerating when near death, and is joined by companions in battles against aliens and other megalomaniacs.
