The document explores Leonard Bernstein's various facets as a conductor, a composer, a pianist and most of all a teacher and how he influenced so many people. It includes interviews of his children, former conductor students, orchestra members, collabrators and other acquintanses. - Pascal Kay
| Actor | Role |
|---|---|
| DDaryl JacksonNarrator | Narrator |
| LLeonard BernsteinHimself | Himself |
 Christoph EschenbachHimself | Himself |
 Kent NaganoHimself | Himself |
 Marin AlsopHimself | Himself |
 Gustavo DudamelHimself | Himself |
| SSue MalletHimself | Himself |
| SSteven J. ShermanHimself | Himself |
| PPeter SchmidlHimself | Himself |