40 years after the completion of the work 'Broken Circle/Spiral Hill', the film that Robert Smithson was never able to finish due to his untimely death has been completed in collaboration between artist Nancy Holt and SKOR.
| Actor | Role |
|---|---|
 Robert SmithsonVoice of | Voice of |
| HHuib Haye van der WerfVoice of | Voice of |