Zoe and the Dulcians are captured by the Quarks and set to work. Unable to convince the Dulcian council of the Dominator threat, the Doctor returns to the island to rescue Zoe.
| Name | Type | Role | |
|---|---|---|---|
| Mervyn Haisman, Henry Lincoln | Writer | ||
| Walter Fitzgerald | Guest Star | ||
| Freddie Wilson | Guest Star | ||
| Alan Gerrard | Guest Star | ||
| John Cross | Guest Star | ||
| Brian Cant | Guest Star | ||
| Ronald Mansell | Guest Star | ||
| Morris Barry | Director |