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William David Daniels (born March 31, 1927) is an American actor, known for his television roles, notably as Mark Craig on the drama series St. Elsewhere, for which he won two Primetime Emmy Awards; the voice of KITT on the television series Knight Rider; and George Feeny on the sitcom Boy Meets World, which earned him four People's Choice Award nominations. He reprised his Knight Rider role in the sequel TV movie Knight Rider 2000 and his Boy Meets World role in the sequel series Girl Meets World. He also portrayed Carter Nash (the actual identity of the eponymous comedic superhero) in Captain Nice. Daniels's film roles include Mr.