Born on March 31, 1927, in Brooklyn, New York, he began his career on Broadway before transitioning to film and television. He gained acclaim for roles in "The Graduate" and as John Adams in the musical "1776." He became widely recognized for portraying Dr. Mark Craig in the TV series "St. Elsewhere," earning multiple Emmy Awards. Additionally, he voiced KITT in "Knight Rider" and appeared as Mr. Feeny in "Boy Meets World." His career spans over seven decades, marked by versatility and critical acclaim.