Based on the book by Naoki Higashida, filmmaker Jerry Rothwell examines the lives of five non-speaking, autistic youngsters.
| Actor | Role |
|---|---|
| JJordan O'DoneganNarrator | Narrator |
 David MitchellSelf | Self |
| DDonna BudwaySelf | Self |
| EEmma BudwaySelf | Self |
| JJeremy DearSelf | Self |
| JJoss DearSelf | Self |
| AAarti KhuranaSelf | Self |
| AAmrit KhuranaSelf | Self |
| SStevie LeeSelf | Self |
| BBenjamin McGannSelf | Self |
| BBertra McGannSelf | Self |
| JJestina Penn-TimitySelf | Self |
| MMary Penn-TimitySelf | Self |
| RRonald Penn-TimitySelf | Self |
| EElizabeth VossellerSelf | Self |
| JJim FujiwaraThe Boy | The Boy |