The Doctor and Romana unwrap an intricate plot involving aliens, time travel and the Mona Lisa. How is Count Scarlioni living in two times at once? And what does he want?
| Name | Type | Role | |
|---|---|---|---|
| Douglas Adams | Writer | ||
| Graham Williams | Writer | ||
| Catherine Schell | Guest Star | ||
| Pamela Stirling | Guest Star | ||
| Kevin Flood | Guest Star | ||
| Michael Hayes | Director |