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 | U.S. viewers (million) |
| --- | --- | --- | --- | --- | --- | --- |
| 61.0 | 1.0 | "The Unforgiven" | David Duchovny | Tom Kapinos | January13,2013 | 1.07 |
| 62.0 | 2.0 | "Quitters" | John Dahl | Tom Kapinos | January20,2013 | 0.74 |
| 63.0 | 3.0 | "Dead Rock Stars" | Adam Bernstein | Tom Kapinos | January27,2013 | 0.89 |
| 64.0 | 4.0 | "Hell Bent for Leather" | David Von Ancken | Tom Kapinos | February10,2013 | 0.75 |
| 65.0 | 5.0 | "Rock and a Hard Place" | David Von Ancken | Tom Kapinos | February17,2013 | 0.67 |
| 66.0 | 6.0 | "In the Clouds" | David Von Ancken | Tom Kapinos | February24,2013 | 0.57 |
| 67.0 | 7.0 | "The Dope Show" | Michael Weaver | Tom Kapinos | March3,2013 | 0.79 |
| 68.0 | 8.0 | "Everybody's a Fucking Critic" | Seith Mann | Tom Kapinos | March10,2013 | 0.69 |
| 69.0 | 9.0 | "Mad Dogs & Englishmen" | Adam Bernstein | Tom Kapinos | March17,2013 | 0.77 |
| 70.0 | 10.0 | "Blind Faith" | Adam Bernstein | Tom Kapinos | March24,2013 | 0.59 |
| 71.0 | 11.0 | "The Abby" | Michael Weaver | Tom Kapinos | March31,2013 | 0.58 |
Question:
What's the season number of the episode watched by 0.57 million US viewers?
Answer:
6.0