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 | U.S. viewers (million) | Rank (week) | Original air date |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 113.0 | 3.0 | " Epic Fail " | Greg Yaitanes | Sara Hess & Liz Friedman | 14.44 | 1.0 | September28,2009 |
| 114.0 | 4.0 | " The Tyrant " | David Straiton | Peter Blake | 13.74 | 10.0 | October5,2009 |
| 115.0 | 5.0 | " Instant Karma " | Greg Yaitanes | Thomas L. Moran | 13.50 | 13.0 | October12,2009 |
| 116.0 | 6.0 | " Brave Heart " | Matt Shakman | Lawrence Kaplow | 11.65 | 21.0 | October19,2009 |
| 117.0 | 7.0 | " Known Unknowns " | Greg Yaitanes | Matthew V. Lewis & Doris Egan | 13.31 | 16.0 | November9,2009 |
| 118.0 | 8.0 | " Teamwork " | David Straiton | Eli Attie | 12.67 | 18.0 | November16,2009 |
| 119.0 | 9.0 | " Ignorance Is Bliss " | Greg Yaitanes | David Hoselton | 11.95 | 17.0 | November23,2009 |
| 120.0 | 10.0 | " Wilson " | Lesli Linka Glatter | David Foster | 13.24 | 6.0 | November30,2009 |
| 121.0 | 11.0 | " The Down Low " | Nick Gomez | Sara Hess & Liz Friedman | 12.25 | 18.0 | January11,2010 |
| 122.0 | 12.0 | " Remorse " | Andrew Bernstein | Peter Blake | 14.21 | 6.0 | January25,2010 |
| 123.0 | 13.0 | " Moving the Chains " | David Straiton | Russel Friend & Garrett Lerner | 13.38 | 15.0 | February1,2010 |
| 124.0 | 14.0 | " 5 to 9 " | Andrew Bernstein | Thomas L. Moran | 13.60 | 15.0 | February8,2010 |
| 125.0 | 15.0 | " Private Lives " | Sanford Bookstaver | Doris Egan | 12.81 | 13.0 | March8,2010 |
| 126.0 | 16.0 | " Black Hole " | Greg Yaitanes | Lawrence Kaplow | 11.37 | 11.0 | March15,2010 |
| 128.0 | 18.0 | " Knight Fall " | Juan J. Campanella | John C. Kelley | 10.81 | 14.0 | April19,2010 |
| 129.0 | 19.0 | " Open and Shut " | Greg Yaitanes | Liz Friedman & Sara Hess | 10.85 | 14.0 | April26,2010 |
| 130.0 | 20.0 | " The Choice " | Juan J. Campanella | David Hoselton | 9.98 | 22.0 | May3,2010 |
| 131.0 | 21.0 | " Baggage " | David Straiton | Doris Egan & David Foster | 9.29 | 27.0 | May10,2010 |
Question:
What is the original air date of the episode that had a week ranking of 21?
Answer:
October19,2009