Investigating the caves, the Doctor is attacked by a dinosaur-like creature. Dr Quinn is hiding a secret that could endanger the lives of everyone.
| Name | Type | Role | |
|---|---|---|---|
| Malcolm Hulke | Writer | ||
| Nancie Jackson | Guest Star | ||
| Fulton Mackay | Guest Star | ||
| Gordon Richardson | Guest Star | ||
| Timothy Combe | Director |