Drake trails two scientists to the West Indies.
| Name | Type | Role | |
|---|---|---|---|
| Malcolm Hulke | Writer | ||
| Ralph Smart | Writer | ||
| Moira Redmond | Guest Star | ||
| Clifton Jones | Guest Star | ||
| Errol John | Guest Star | ||
| Paul Danquah | Guest Star | ||
| Margaret Nolan | Guest Star | ||
| Pearl Prescod | Guest Star | ||
| Robert Dean | Guest Star | ||
| Earl Cameron | Guest Star | ||
| Don Chaffey | Director |