The Doctor and Jo visit the Master who is held prisoner on an island. They learn that several ships have recently been sunk in the area and the Doctor decides to investigate.
| Name | Type | Role | |
|---|---|---|---|
| Malcolm Hulke | Writer | ||
| Royston Tickner | Guest Star | ||
| Clive Morton | Guest Star | ||
| Brian Justice | Guest Star | ||
| Hugh Futcher | Guest Star | ||
| Neil Seiler | Guest Star | ||
| Michael E. Briant | Director |