The Cybermen have immobilised the Earth's population with a hypnotic signal. Their fleet arrives and they invade in force. The Doctor desperately attempts to persuade Vaughn to help him resist the invaders.
| Name | Type | Role | |
|---|---|---|---|
| Derrick Sherwin | Writer | ||
| John Spradbury | Guest Star | ||
| Clifford Earl | Guest Star | ||
| Richard King | Guest Star | ||
| Charles Finch | Guest Star | ||
| Peter Thornton | Guest Star | ||
| Douglas Camfield | Director |