England, the late 1970s. The Doctor and Romana arrive in search of the third segment. But the Tracer readings are erratic and something ominous is happening with an ancient stone circle...
| Name | Type | Role | |
|---|---|---|---|
| David Fisher | Writer | ||
| Nicholas McArdle | Guest Star | ||
| Elaine Ives-Cameron | Guest Star | ||
| Beatrix Lehmann | Guest Star | ||
| Susan Engel | Guest Star | ||
| Darrol Blake | Director |