William David Daniels is an American actor and former president of the Screen Actors Guild . He is known for his performance as Dustin Hoffman's father in The Graduate , as Howard in Two for the Road, as John Adams in 1776, as Carter Nash in Captain Nice, as Mr. George Feeny in ABC's Boy Meets World and its sequel, Disney Channel's Girl Meets World, as the voice of KITT in Knight Rider, and as Dr. Mark Craig in St. Elsewhere, for which he won two Emmy Awards.