Who is Jack Sheldon? You may remember him as Merv Griffin's comedic trumpet-wielding sidekick, or the indelible voice on School House Rock, but musicians know him as a jazz giant. Unlike his close friend and collaborator, Chet Baker, Jack Sheldon survived the demons of drugs, alcohol and unspeakable personal tragedy. His signature sound continues to paint the landscape of American music. As friend Billy Crystal puts it, Jack Sheldon is "the last cat standing" from the bebop generation. When the stars come out to play, it's Jack Sheldon who plays for them.