| Season: | 23 |
| Doctor: | Sixth Doctor |
| Companion | Peri |
| Original Airdate: | 4th October - 25th October 1986 |
| Format: | 4 25-minute episodes |
| Production Code: | 7B |
| Writer: | Philip Martin |
| Director: | Ron Jones |
| Producer: | John Nathan-Turner |
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