Dreilide Thrace

Classical concert pianist and father of Kara "Starbuck" Thrace, revealed in the "Someone to Watch Over Me" episode of the SciFi Channel's reboot of Battlestar Galactica.

We briefly see a battered cassette of his Live at the Helice Opera House album, which is kinda hilarious, since it's on a high tech spaceship that can go faster than light and they are still using magnetic tape?

Dreilide taught Kara how to play "All Along the Watchtower," which turns out to be a mystical tune holding the secrets of the location of the even more mystical planet Earth. And the tune is several tens of thousands of years old. Somehow.