England, the near future. The Doctor attempts to thwart the plans of a group of unscrupulous scientists who threaten the Earth's destruction, and plan to use their giant robot to obtain the power they need to blackmail the world into obeying them.
| Name | Type | Role | |
|---|---|---|---|
| Terrance Dicks | Writer | ||
| Patricia Maynard | Guest Star | ||
| Christopher Barry | Director |