Two employees of the millionnaire Harrison Chase arrive at the Antarctic base, and they will stop at nothing to get hold of the second seed-pod.
| Name | Type | Role | |
|---|---|---|---|
| Robert Banks Stewart | Writer | ||
| John Challis | Guest Star | ||
| Michael McStay | Guest Star | ||
| Tony Beckley | Guest Star | ||
| John Gleeson | Guest Star | ||
| Hubert Rees | Guest Star | ||
| Mark Jones | Guest Star | ||
| Kenneth Gilbert | Guest Star | ||
| Douglas Camfield | Director |