John Colicos as BaltarCanadian-born actor John Colicos, known for numerous genre roles among his countless TV appearances, dies at the age of 71. In the original Star Trek, he was the first actor to be seen portraying a Klingon, in the 1967 episode Errand Of Mercy, and would later reprise the role in two episodes of the 1990s spinoff Star Trek: Deep Space Nine. In the late 1970s, he had a recurring role as Count Baltar, the chief human antagonist in the original Battlestar Galactica.