With Steven in urgent need of medical care, the Doctor lands the TARDIS on the hostile world of Kembel, and sets out to look for aid.
| Name | Type | Role | |
|---|---|---|---|
| Terry Nation | Writer | ||
| Pamela Greer | Guest Star | ||
| Michael Guest | Guest Star | ||
| Philip Anthony | Guest Star | ||
| Brian Cant | Guest Star | ||
| Douglas Camfield | Director |