Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| # | Episode | Writer | Director | Original air date | Viewing figure |
| --- | --- | --- | --- | --- | --- |
| 11.0 | "Episode 1"(75-minute Christmas special) | Bill Gallagher | Alan Grint | 21December2008 | 6.58 million |
| 12.0 | "Episode 2" | Bill Gallagher | Alan Grint | 4January2009 | 6.53 million |
| 13.0 | "Episode 3" | Bill Gallagher | Alan Grint | 11January2009 | 6.13 million |
| 14.0 | "Episode 4" | Carolyn Bonnyman | Maurice Phillips | 18January2009 | 6.49 million |
| 15.0 | "Episode 5" | Bill Gallagher | Julian Holmes | 25January2009 | 6.31 million |
| 16.0 | "Episode 6" | Gaby Chiappe | Moira Armstrong | 1February2009 | 6.54 million |
| 17.0 | "Episode 7" | Gaby Chiappe | Sue Tully | 8February2009 | 6.14 million |
| 18.0 | "Episode 8" | Kate Gartside | Alan Grint | 15February2009 | 6.20 million |
| 19.0 | "Episode 9" | Kate Gartside | David Tucker | 22February2009 | 6.32 million |
| 20.0 | "Episode 10" | Carolyn Bonnyman | Patrick Lau | 1March2009 | 6.34 million |
| 21.0 | "Episode 11" | Gaby Chiappe | Paul Marcus | 8March2009 | 6.78 million |
Question:
Who wrote the episode that David Tucker directed?
Answer:
1.0