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 (million) |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 21.0 | 1.0 | " A New Day in the Old Town " | Akiva Goldsman | J. J. Abrams & Akiva Goldsman | September17,2009 | 3X5101 | 7.82 |
| 22.0 | 2.0 | " Night of Desirable Objects " | Brad Anderson | Jeff Pinkner & J. H. Wyman | September24,2009 | 3X5102 | 5.73 |
| 23.0 | 3.0 | " Fracture " | Bryan Spicer | David Wilcox | October1,2009 | 3X5103 | 6.03 |
| 24.0 | 4.0 | " Momentum Deferred " | Joe Chappelle | Zack Stentz & Ashley Edward Miller | October8,2009 | 3X5104 | 5.83 |
| 25.0 | 5.0 | " Dream Logic " | Paul Edwards | Josh Singer | October15,2009 | 3X5105 | 5.78 |
| 26.0 | 6.0 | " Earthling " | Jon Cassar | J. H. Wyman & Jeff Vlaming | November5,2009 | 3X5106 | 4.86 |
| 27.0 | 7.0 | " Of Human Action " | Joe Chappelle | Robert Chiappetta & Glen Whitman | November12,2009 | 3X5107 | 5.91 |
| 28.0 | 8.0 | " August " | Dennis Smith | J. H. Wyman & Jeff Pinkner | November19,2009 | 3X5108 | 5.90 |
| 29.0 | 9.0 | " Snakehead " | Paul Holahan | David Wilcox | December3,2009 | 3X5109 | 6.94 |
| 30.0 | 10.0 | " Grey Matters " | Jeannot Szwarc | Ashley Edward Miller & Zack Stentz | December10,2009 | 3X5110 | 6.32 |
| 31.0 | 11.0 | " Unearthed " | Frederick E. O. Toye | David H. Goodman & Andrew Kreisberg | January11,2010 | 3T7670 | 7.72 |
| 32.0 | 12.0 | " Johari Window " | Joe Chappelle | Josh Singer | January14,2010 | 3X5111 | 6.60 |
| 33.0 | 13.0 | " What Lies Below " | Deran Sarafian | Jeff Vlaming | January21,2010 | 3X5112 | 6.90 |
| 34.0 | 14.0 | " The Bishop Revival " | Adam Davidson | Glen Whitman & Robert Chiappetta | January28,2010 | 3X5113 | 8.90 |
| 35.0 | 15.0 | " Jacksonville " | Charles Beeson | Ashley Edward Miller & Zack Stentz | February4,2010 | 3X5114 | 7.40 |
| 37.0 | 17.0 | " Olivia. In the Lab. With the Revolver. " | Brad Anderson | Matthew Pitts | April8,2010 | 3X5116 | 6.33 |
| 38.0 | 18.0 | " White Tulip " | Thomas Yatsko | J. H. Wyman & Jeff Vlaming | April15,2010 | 3X5117 | 6.62 |
| 39.0 | 19.0 | " The Man from the Other Side " | Jeffrey Hunt | Josh Singer & Ethan Gross | April22,2010 | 3X5118 | 5.84 |
| 40.0 | 20.0 | " Brown Betty " | Seith Mann | Jeff Pinkner & J. H. Wyman & Akiva Goldsman | April29,2010 | 3X5119 | 5.55 |
| 42.0 | 22.0 | " Over There (Part 1) " | Akiva Goldsman | J. H. Wyman & Jeff Pinkner & Akiva Goldsman | May13,2010 | 3X5121 | 6.00 |
Question:
What is the most recent episode number written by Matthew Pitts?
Answer:
17.0