William Daniels wasn't just an onscreen mentor to the young cast of Boy Meets World in the 1990s as Mr. George Feeny - he became a real-life confidant throughout 30 years of friendship. The legendary actor already had a 50-year career in Hollywood - including playing Dustin Hoffman's father in 1967's The Graduate and voicing K.I.T.T. the talking car in TV's Knight Rider in the 1980s - when he was cast as Jefferson Elementary School (and later John Adams High School) teacher George Feeny in 1993.