The Master uses The Rani's mind-controlling parasites to keep a meeting of Earth's leading scientists from being cancelled, and helps her plant transformation land mines for The Doctor, as he continues to propose an alliance with her in ruling over Earth.
| Name | Type | Role | |
|---|---|---|---|
| Pip Baker, Jane Baker | Writer | ||
| William Ilkley | Guest Star | ||
| Gawn Grainger | Guest Star | ||
| Terence Alexander | Guest Star | ||
| Peter Childs | Guest Star | ||
| Gary Cady | Guest Star | ||
| Sarah Hellings | Director |