A boy obsessively collects poisons - and then he tries them out, with deadly results.
| Name | Type | Role | |
|---|---|---|---|
| Ruth Rendell | Writer | ||
| Roy MacGregor | Writer | ||
| Ruth Platt | Guest Star | ||
| James Snell | Guest Star | ||
| Neil Dalglish | Guest Star | ||
| Susan Penhaligon | Guest Star | ||
| Beth Goddard | Guest Star | ||
| Mary McMurray | Director |