Finding evidence of alien technology in Smythe's office, the Doctor, Jamie and Zoe make their escape in Lady Jennifer's ambulance, but Smythe gives orders to have them killed.
| Name | Type | Role | |
|---|---|---|---|
| Malcolm Hulke, Terrance Dicks | Writer | ||
| Tony McEwan | Guest Star | ||
| Noel Coleman | Guest Star | ||
| Peter Stanton | Guest Star | ||
| David Maloney | Director |