46 minutes
The Doctor joins a guided tour to a planet made of diamonds. However, the vehicle breaks down and suddenly there is a knocking on the outside of the hull.
info
| Person | Character |
|---|---|
| David Tennant | The Doctor |
| Catherine Tate | Donna Noble |
| Person | Position |
|---|---|
| Russel T. Davies | Writer |
| Alice Troughton | Director |