A long career. William Daniels had been in the film and TV industry for decades when he began portraying the beloved teacher Mr. Feeny on the coming-of-age sitcom Boy Meets World in 1993. "Mr. Feeny's appeal was due to the fact that he was a friend, a mentor and an advisor all rolled into one," Daniels wrote in his March 2017 memoir There I Go Again: How I Came to Be Mr. Feeny, John Adams, Dr. Craig, KITT & Many Others.