Trying to rescue the Doctor from the Tractator's trap, Tegan lands them both in even more trouble. Turlough goes a bit mad, and reckons he knows the evil of the Tractators from old.
| Name | Type | Role | |
|---|---|---|---|
| Christopher Bidmead | Writer | ||
| Stephen Speed | Guest Star | ||
| George Campbell | Guest Star | ||
| William Lucas | Guest Star | ||
| Jeff Rawle | Guest Star | ||
| Hedi Khursandi | Guest Star | ||
| John Gillett | Guest Star | ||
| Maurice O'Connell | Guest Star | ||
| Alison Skilbeck | Guest Star | ||
| William Bowen | Guest Star | ||
| Michael Malcolm | Guest Star | ||
| Raymond Murtagh | Guest Star | ||
| Peter Gilmore | Guest Star | ||
| Ron Jones | Director |