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. in series | No. in season | Title | Directed by | Written by | Original air date |
| --- | --- | --- | --- | --- | --- |
| 13.0 | 1.0 | "Slip of the Tongue" | David Duchovny | Tom Kapinos | September28,2008 |
| 14.0 | 2.0 | "The Great Ashby" | David Von Ancken | Tom Kapinos | October5,2008 |
| 15.0 | 3.0 | "No Way to Treat a Lady" | John Dahl | Gina Fattore | October12,2008 |
| 16.0 | 4.0 | "The Raw & the Cooked" | David Von Ancken | Tom Kapinos | October19,2008 |
| 17.0 | 5.0 | "Vaginatown" | Ken Whittingham | Jay Dyer | October26,2008 |
| 18.0 | 6.0 | "Coke Dick & First Kick" | Michael Lehmann | Gina Fattore & Gabriel Roth | November2,2008 |
| 19.0 | 7.0 | "In a Lonely Place" | Jake Kasdan | Tom Kapinos | November9,2008 |
| 20.0 | 8.0 | "Going Down and Out in Beverly Hills" | Danny Ducovny | Daisy Gardner | November16,2008 |
| 21.0 | 9.0 | "La Ronde" | Adam Bernstein | Gina Fattore | November23,2008 |
| 22.0 | 10.0 | "In Utero" | David Von Ancken | Tom Kapinos | November30,2008 |
| 23.0 | 11.0 | "Blues from Laurel Canyon" | Michael Lehmann | Gina Fattore | December7,2008 |
Question:
How many episodes have been directed by David Duchovny?
Answer:
1.0