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 (millions) |
| --- | --- | --- | --- | --- | --- | --- |
| 143.0 | 1.0 | "Resurrection" (Part 2) | Joe Chappelle | Barry O'Brien | September22,2008 | 17.23 |
| 144.0 | 2.0 | "Won't Get Fueled Again" | Matt Earl Beesley | Corey Evett & Matt Partney | September29,2008 | 14.35 |
| 145.0 | 3.0 | "And How Does That Make You Kill?" | Sam Hill | Tamara Jaron | October6,2008 | 13.88 |
| 146.0 | 4.0 | "Raging Cannibal" | Gina Lamar | Brian Davidson | October13,2008 | 13.22 |
| 147.0 | 5.0 | "Bombshell" | Eric Mirich | Marc Dube | October20,2008 | 13.51 |
| 148.0 | 6.0 | "Wrecking Crew" | Joe Chappelle | Corey Miller | November3,2008 | 12.74 |
| 149.0 | 7.0 | "Cheating Death" | Sam Hill | Krystal Houghton | November10,2008 | 13.82 |
| 150.0 | 8.0 | "Gone Baby Gone" | Carey Meyer | Dominic Abeyta | November17,2008 | 15.46 |
| 151.0 | 9.0 | "Power Trip" | Joe Chappelle | Corey Evett & Matt Partney | November24,2008 | 14.33 |
| 152.0 | 10.0 | "The DeLuca Motel" | Gina Lamar | Sunil Nayar | December8,2008 | 13.79 |
| 153.0 | 11.0 | "Tipping Point" | Marco Black | Brian Davidson | December15,2008 | 14.56 |
| 154.0 | 12.0 | "Head Case" | Sam Hill | Tamara Jaron | January12,2009 | 15.83 |
| 155.0 | 13.0 | "And They're Offed" | Matt Earl Beesley | Barry O'Brien | January19,2009 | 14.58 |
| 156.0 | 14.0 | "Smoke Gets in Your CSI's" | Joe Chappelle | Krystal Houghton | February2,2009 | 16.10 |
| 157.0 | 15.0 | "Presumed Guilty" | Larry Detwiler | Corey Miller | February9,2009 | 13.81 |
| 158.0 | 16.0 | "Sink or Swim" | Sam Hill | Marc Dube | March2,2009 | 13.42 |
| 159.0 | 17.0 | "Divorce Party" | Karen Gaviola | Corey Evett & Matt Partney | March9,2009 | 14.22 |
| 160.0 | 18.0 | "Flight Risk" | Joe Chappelle | Sunil Nayar | March16,2009 | 13.61 |
| 161.0 | 19.0 | "Target Specific" (Part 1) | Sam Hill | Tamara Jaron | March23,2009 | 13.67 |
| 162.0 | 20.0 | "Wolfe In Sheep's Clothing" (Part 2) | Carey Meyer | Krystal Houghton | March30,2009 | 13.46 |
| 163.0 | 21.0 | "Chip/Tuck" | Allison Liddi-Brown | Brian Davidson | April13,2009 | 13.39 |
| 164.0 | 22.0 | "Dead on Arrival" | Gina Lamar | Corey Miller | April27,2009 | 12.12 |
| 165.0 | 23.0 | "Collateral Damage" | Sam Hill | Marc Dube | May4,2009 | 13.72 |
| 166.0 | 24.0 | "Dissolved" | Matt Earl Beesley | Corey Evett & Matt Partney | May11,2009 | 13.59 |
Question:
How many millions of U.S. viewers watched the episode directed by Allison Liddi-Brown? 
Answer:
13.39