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) |
| --- | --- | --- | --- | --- | --- | --- |
| 24.0 | 1.0 | "See No Evil" | Thomas J. Wright | Chris Crowe | September28,2004 | 14.33 |
| 25.0 | 2.0 | "The Good Wives Club" | Dennis Smith | Gil Grant | October5,2004 | 14.28 |
| 26.0 | 3.0 | "Vanished" | James Whitmore, Jr. | Frank Cardea and George Schenck | October12,2004 | 14.86 |
| 28.0 | 5.0 | "The Bone Yard" | Terrence O'Hara | John C. Kelley | October26,2004 | 13.68 |
| 29.0 | 6.0 | "Terminal Leave" | Jeff Woolnough | Roger Director | November16,2004 | 15.27 |
| 30.0 | 7.0 | "Call of Silence" | Thomas J. Wright | Roger Director | November23,2004 | 14.71 |
| 31.0 | 8.0 | "Heart Break" | Dennis Smith | Frank Cardea and George Schenck | November30,2004 | 15.65 |
| 32.0 | 9.0 | "Forced Entry" | Dennis Smith | John C. Kelley and Jesse Stern | December7,2004 | 14.59 |
| 33.0 | 10.0 | "Chained" | Thomas J. Wright | Frank Military | December14,2004 | 14.64 |
| 34.0 | 11.0 | "Black Water" | Terrence O'Hara | Juan Carlos Coto and John C. Kelly | January11,2005 | 15.40 |
| 35.0 | 12.0 | "Doppelgänger" | Terrence O'Hara | Jack Bernstein | January18,2005 | 14.53 |
| 36.0 | 13.0 | "The Meat Puzzle" | Thomas J. Wright | Frank Military | February8,2005 | 12.74 |
| 37.0 | 14.0 | "Witness" | James Whitmore, Jr. | Frank Cardea and George Schenck | February15,2005 | 13.04 |
| 38.0 | 15.0 | "Caught on Tape" | Jeff Woolnough | Chris Crowe, Gil Grant and John C. Kelley | February22,2005 | 13.59 |
| 39.0 | 16.0 | "Pop Life" | Thomas J. Wright | Frank Military | March1,2005 | 13.68 |
| 40.0 | 17.0 | "An Eye for an Eye" | Dennis Smith | Steven Kane | March22,2005 | 14.86 |
| 41.0 | 18.0 | "Bikini Wax" | Stephen Cragg | David North | March29,2005 | 14.27 |
| 42.0 | 19.0 | "Conspiracy Theory" | Jeff Woolnough | Frank Military | April12,2005 | 13.89 |
| 43.0 | 20.0 | "Red Cell" | Dennis Smith | Christopher Silber | April26,2005 | 13.67 |
| 44.0 | 21.0 | "Hometown Hero" | James Whitmore, Jr. | Frank Cardea and George Schenck | May3,2005 | 13.55 |
| 45.0 | 22.0 | "SWAK" | Dennis Smith | Donald Bellisario | May10,2005 | 13.58 |
Question:
How many number of series have the title "call of silence"?
Answer:
30.0