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| Season: | 15 |
| Doctor: | Fourth Doctor |
| Companion | Leela |
| K9 Mk1 | |
| Original Airdate: | 29th October - 19th November 1977 |
| Format: | 4 25-minute episodes |
| Production Code: | 4X |
| Writer: | Chris Boucher |
| Director: | George Spenton-Foster |
| Producer: | Graham Williams |
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Crew
Bad Guys
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Television
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Next story: The Sun Makers |
All Media
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Next story: The Sun Makers |
