Steve Ihnat (August 7, 1934 May 12, 1972 age 37) was a Czechoslovakian-born actor and director. He immigrated to Canada when he was five years old, and later became a United States citizen.
Not a very long life...
take a look at this fan made star trek documentary.
I is about the pre-jjabramverse history with some major actor’s playing parts.
https://www.youtube.com/watch?v=1W1_8IV8uhA