Jack Black is a disturbed commercial actor who believes himself to be trapped in a television play, followed around by an invisible camera.
| Actor | Role |
|---|---|
 Denholm ElliottJack Black | Jack Black |
 Billie WhitelawJudy Black | Judy Black |
 Richard VernonDr Whitman | Dr Whitman |
 Bernard HeptonColin Sands | Colin Sands |
 Dennis WatermanDr Bilson | Dr Bilson |
 Michele DotriceVeronica Sands | Veronica Sands |