The Doctor and Peri meet Jamie and learn the Second Doctor is with the Sontarans on Earth.
| Name | Type | Role | |
|---|---|---|---|
| Robert Holmes | Writer | ||
| James Saxon | Guest Star | ||
| Carmen Gómez | Guest Star | ||
| Frazer Hines | Guest Star | ||
| Tim Raynham | Guest Star | ||
| John Stratton | Guest Star | ||
| Jacqueline Pearce | Guest Star | ||
| Peter Moffatt | Director |