Opera singer and professor Dr P is examined both in a clinic and in his home, as he suffers from a degeneration of the occipital lobe that allows him to see details but not wholes.
| Actor | Role |
|---|---|
 Oliver SacksHimself | Himself |
| JJohn TigheNot listed | Not listed |
| EEmile BelcourtNot listed | Not listed |
| PPatricia HooperNot listed | Not listed |
| FFrederick WestcottNot listed | Not listed |
 Alexander BălănescuNot listed | Not listed |
| DDebra HauerNot listed | Not listed |
| EElisabeth PerryNot listed | Not listed |
| RRuth PhillipsNot listed | Not listed |
| EElizabeth WilsonNot listed | Not listed |