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 | Title | Directed by | Written by | Original air date | Prod. No. | Viewers (millions) |
| --- | --- | --- | --- | --- | --- | --- |
| 1.0 | "Identity" | James Whitmore, Jr. | Shane Brennan | September22,2009 | 101.0 | 18.73 |
| 2.0 | "The Only Easy Day" | Terrence O'Hara | R. Scott Gemmill | September29,2009 | 102.0 | 17.42 |
| 3.0 | "Predator" | Tony Wharmby | Dave Kalstein | October6,2009 | 104.0 | 16.31 |
| 4.0 | "Search and Destroy" | Steve Boyum | Gil Grant | October13,2009 | 105.0 | 15.32 |
| 5.0 | "Killshot" | David Barrett | Shane Brennan | October20,2009 | 103.0 | 16.50 |
| 6.0 | "Keepin' It Real" | Leslie Libman | Matt Pyken | November3,2009 | 106.0 | 15.29 |
| 7.0 | "Pushback" | Paris Barclay | Shane Brennan | November10,2009 | 107.0 | 16.19 |
| 8.0 | "Ambush" | Rod Holcomb | Lindsay Sturman | November17,2009 | 108.0 | 14.81 |
| 9.0 | "Random on Purpose" | Steven DePaul | Speed Weed | November24,2009 | 109.0 | 17.18 |
| 12.0 | "Past Lives" | Elodie Keene | Dave Kalstein | January12,2010 | 112.0 | 15.50 |
| 13.0 | "Missing" | David Barrett | Gil Grant and Matt Pyken | January26,2010 | 113.0 | 17.16 |
| 14.0 | "LD50" | Jonathan Frakes | Speed Weed and R. Scott Gemmill | February2,2010 | 114.0 | 16.42 |
| 15.0 | "The Bank Job" | Terrence O'Hara | Dave Kalstein | February9,2010 | 115.0 | 17.91 |
| 16.0 | "Chinatown" | Alan J. Levi | Lindsay Sturman | March2,2010 | 116.0 | 14.97 |
| 17.0 | "Full Throttle" | David Barrett | Joseph C. Wilson | March9,2010 | 117.0 | 16.99 |
| 18.0 | "Blood Brothers" | Karen Gaviola | Tim Clemente | March16,2010 | 118.0 | 15.10 |
| 19.0 | "Hand-to-Hand" | Paris Barclay | Matt Pyken | April6,2010 | 119.0 | 13.79 |
| 20.0 | "Fame" | Dennis Smith | Speed Weed | April27,2010 | 120.0 | 15.62 |
| 21.0 | "Found" | James Whitmore, Jr. | R. Scott Gemmill | May4,2010 | 121.0 | 14.34 |
| 22.0 | "Hunted" | Steven DePaul | Corey Miller | May11,2010 | 122.0 | 16.04 |
Question:
How many episodes have 18.73 million viewers?
Answer:
1.0