In 1968, Elvis Presley taped a "Comeback Special" for television that proved to be a huge success and helped restore him to popularity, but it almost never got made.
Elvis was convinced that he didn't need to "come back;" he was still "the King."
So TV producer Steve Binder took Elvis out to Sunset Boulevard. When absolutely nobody recognized him, Elvis realized he did, indeed, need to "come back" and so agreed to make the TV show that would propel the rest of his career.