The Master is in league with the Axons who intend to consume Earth. The Doctor subjects Axonite to tests and discovers the terrible truth.
| Name | Type | Role | |
|---|---|---|---|
| Dave Martin, Bob Baker | Writer | ||
| Donald Hewlett | Guest Star | ||
| Michael Walker | Guest Star | ||
| David G. March | Guest Star | ||
| Patricia Gordino | Guest Star | ||
| Paul Grist | Guest Star | ||
| Michael Ferguson | Director |