With Polly having apparently forgotten them, the Doctor, Ben and Jamie decide to carry out their own investigation of Chameleon Tours.
| Name | Type | Role | |
|---|---|---|---|
| David Ellis | Writer | ||
| Malcolm Hulke | Writer | ||
| Brigit Paul | Guest Star | ||
| Madalena Nicol | Guest Star | ||
| Gilly Fraser | Guest Star | ||
| Gerry Mill | Director |