"Hi Ho Silver" is a song by Scottish singer/songwriter Jim Diamond. It is best known for being the theme song for Boon. The song was from Diamond's second solo studio album Desire for Freedom. It reached #5 on the UK chart in 1986.

Although many people believe that Diamond wrote the song especially for Boon, he actually wrote it in memory of his father who had died the previous year.

Diamond was approached by Central Television in 1985 to write and record the theme song for a new television drama series. Diamond at first declined the offer but Central were persistent. He told them to send a script of the pilot episode so he could read it over. The script was headed "Ken Boon - Fireman". This instantly had him intrigued and he felt that he should do it. His father had been a firefighter for many years. The songs lyrics explain how Jim's father had "rescued" him on many occasions when he was down on his luck and how he regarded his father as The Lone Ranger and his hero.

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