Human Cost of Cancer: Remember Notable People Lost in 2012 - Slideshow

Don Grady, an original Mouseketeer and oldest son Robby Douglas on TV’s My Three Sons, died June 27, 2012 after a long battle with cancer. He was 68 years old.

A musical prodigy from a young age, Grady appeared with a band, the Greefs, in the TV series, and played drums for the Yellow Balloon, a group that had a minor hit with a self-titled song in 1967.

Grady is also credited with writing the theme for The Phil Donahue Show, music for the Blake Edwards movie Switch, and the popular Las Vegas show EFX.