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:
| No. by series | Title | Directed by | Written by | Original air date | Production number | U.S. viewers (in millions) |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | "Flowers for Your Grave" | Rob Bowman | Andrew W. Marlowe | March9,2009 | 101.0 | 10.76 |
| 2.0 | "Nanny McDead" | John Terlesky | Barry Schindel | March16,2009 | 103.0 | 10.97 |
| 3.0 | "Hedge Fund Homeboys" | Rob Bowman | David Grae | March23,2009 | 104.0 | 9.14 |
| 4.0 | "Hell Hath No Fury" | Rob Bowman | Andrew W. Marlowe | March30,2009 | 102.0 | 9.09 |
| 5.0 | "A Chill Goes Through Her Veins" | Bryan Spicer | Charles Murray | April6,2009 | 105.0 | 9.03 |
| 6.0 | "Always Buy Retail" | Jamie Babbit | Gabrielle Stanton & Harry Werksman | April13,2009 | 107.0 | 7.73 |
| 7.0 | "Home is Where the Heart Stops" | Dean White | Will Beall | April20,2009 | 106.0 | 8.21 |
| 8.0 | "Ghosts" | Bryan Spicer | Moira Kirland | April27,2009 | 108.0 | 8.24 |
Question:
How many different writers have written the episode with series number 8?
Answer:
1.0