The death of a butterfly collector's assistant in India opens an unlikely investigation.
| Name | Type | Role | |
|---|---|---|---|
| David Weir | Writer | ||
| Warren Mitchell | Guest Star | ||
| John Bennett | Guest Star | ||
| Frank Olegario | Guest Star | ||
| Zia Mohyeddin | Guest Star | ||
| Michael Nightingale | Guest Star | ||
| Kumar Ranji | Guest Star | ||
| George Pastell | Guest Star | ||
| Dean Francis | Guest Star | ||
| Jaron Yaltan | Guest Star | ||
| Balu Patel | Guest Star | ||
| Michael Trubshawe | Guest Star | ||
| Virginia Maskell | Guest Star | ||
| Zoe Zephyr | Guest Star | ||
| Kenneth Adams | Guest Star | ||
| Philip Leacock | Director |