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. | # | Title | Directed by | Written by | Bens location | Original air date | U.S. viewers (million) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 13.0 | 1.0 | "Los Moscos" [c ] | Jeremy Podeswa | Daniel Knauf | Loving, New Mexico [c ] | January9,2005 | 1.81 |
| 14.0 | 2.0 | "Alamogordo, NM" | Jack Bender | William Schmidt | Alamogordo, New Mexico [d ] | January16,2005 | N/A |
| 15.0 | 3.0 | "Ingram, TX" | John Patterson | John J. McLaughlin | Ingram, Texas | January23,2005 | N/A |
| 16.0 | 4.0 | "Old Cherry Blossom Road" | Steve Shill | Dawn Prestwich & Nicole Yorkin | Ingram, Texas | January30,2005 | N/A |
| 17.0 | 5.0 | "Creed, OK" | Jeremy Podeswa | Tracy Tormé | Creed, Oklahoma | February6,2005 | N/A |
| 18.0 | 6.0 | "The Road to Damascus" | Tucker Gates | Dawn Prestwich & Nicole Yorkin | N/A | February13,2005 | 1.5 |
| 20.0 | 8.0 | "Outskirts, Damascus, NE" | Tim Hunter | Daniel Knauf | Damascus, Nebraska | February27,2005 | N/A |
| 21.0 | 9.0 | "Lincoln Highway" [e ] | Rodrigo García | William Schmidt | Lincoln Highway , Wyoming [e ] | March6,2005 | 1.96 |
| 22.0 | 10.0 | "Cheyenne, WY" | Todd Field | Tracy Tormé | Cheyenne, Wyoming | March13,2005 | N/A |
Question:
What's the number of the episode directed by Tucker Gates?
Answer:
18.0