He independently release his third album,
Voice in the Wind, in 1994. While working as an executive at
Sony Pictures Television, Castle began working on a project entitled "Conversations", that evolved into his fourth album,
Music for Your Soul (released on May 16, 2006). On June 5, 2012, he released the single "I See the Clouds Go By", which was dedicated to recently deceased Monkee
Davy Jones. On July 15, 2012, his song, "Conversations", appeared in the
season five premiere of
Breaking Bad. His final single was "Christmas Every Day," released in time for
Christmas 2015. ==Private life==