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:
| # | Title | Directed by | Written by | Original air date | Production code | U.S. viewers (millions) |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | "A Love of a Lifetime" | Alex Graves | Kevin Falls | September24,2007 | 1ANJ79 | 9.16 |
| 2.0 | "Friendly Skies" | Alex Graves | Kevin Falls | October1,2007 | 1ANJ01 | 8.23 |
| 3.0 | "Game Three" | Alex Graves | Tom Szentgyorgyi | October8,2007 | 1ANJ02 | 6.94 |
| 4.0 | "The Year of the Rabbit" | Laura Innes | Joan B. Weiss | October15,2007 | 1ANJ03 | 6.75 |
| 5.0 | "The Legend of Dylan McCleen" | Allison Liddi | Matt McGuinness | October22,2007 | 1ANJ04 | 6.06 |
| 6.0 | "Keepers" | Andrew Bernstein | Paul Redford | October29,2007 | 1ANJ05 | 5.75 |
| 7.0 | "Double Down" | Alex Graves | J. R. Orci | November5,2007 | 1ANJ06 | 5.13 |
| 8.0 | "Winterland" | Helen Shaver | Dana Calvo | November12,2007 | 1ANJ07 | 6.09 |
| 9.0 | "Emily"(Part 1) | Frederick King Keller | Juan Carlos Coto | November19,2007 | 1ANJ08 | 5.61 |
| 10.0 | "Blowback"(Part 2) | Karen Gaviola | Kevin Falls | November26,2007 | 1ANJ09 | 6.05 |
| 11.0 | "Home By Another Way" | Lesli Linka Glatter | Tom Szentgyorgyi | December10,2007 | 1ANJ10 | 5.28 |
| 12.0 | "The Hanged Man"(Part 1) | Steven DePaul | Tracy McMillan | December17,2007 | 1ANJ11 | 4.24 |
Question:
How many different original air dates did the episode number 6 have? 
Answer:
1.0