Mr. Charles's voice is no doubt most widely known because of a television theme song he sang (with Julia Rinker Miller): the theme to the 1970s and '80s TV show Three's Company ("Come and Knock on Our Door").
In the 1970s and 1980s, he was affiliated with such programs as The Muppets, and Sha-Na-Na. A brief tune he wrote for Perry Como's TV show--"Letters, We Get Letters"--was later used, for years, on David Letterman's program. For three decades, beginning in the early 1980s, he served as a musical consultant to the Kennedy Center Honors programs.
As I wrote in my book:
He joined the Hit Parade TV show, as vocal arranger, in 1950, the year the program came to television. The following is from my book: