The Krotons are preparing to leave the planet and demand that the Gonds hand over the Doctor and Zoe, so that their mental energy can be drained.
| Name | Type | Role | |
|---|---|---|---|
| Robert Holmes | Writer | ||
| Gilbert Wynne | Guest Star | ||
| Madeleine Mills | Guest Star | ||
| James Copeland | Guest Star | ||
| Patrick Tull | Guest Star | ||
| Robert LaBassiere | Guest Star | ||
| Miles Northover | Guest Star | ||
| David Maloney | Director |