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 |
| --- | --- | --- | --- | --- | --- | --- | --- |
| 72.0 | 2.0 | " The Right Stuff " | Deran Sarafian | Doris Egan & Leonard Dick | 17.44 | 6 | October2,2007 |
| 73.0 | 3.0 | " 97 Seconds " | David Platt | Russel Friend & Garrett Lerner | 18.03 | 5 | October9,2007 |
| 74.0 | 4.0 | " Guardian Angels " | Deran Sarafian | David Hoselton | 18.10 | 5 | October23,2007 |
| 75.0 | 5.0 | " Mirror Mirror " | David Platt | David Foster | 17.29 | 7 | October30,2007 |
| 77.0 | 7.0 | " Ugly " | David Straiton | Sean Whitesell | 16.95 | 6 | November13,2007 |
| 78.0 | 8.0 | " You Don't Want to Know " | Lesli Linka Glatter | Sara Hess | 16.88 | 6 | November20,2007 |
| 79.0 | 9.0 | " Games " | Deran Sarafian | Eli Attie | 16.96 | 7 | November27,2007 |
| 80.0 | 10.0 | " It's a Wonderful Lie " | Matt Shakman | Pamela Davis | 22.56 | 6 | January29,2008 |
| 81.0 | 11.0 | " Frozen " | David Straiton | Liz Friedman | 29.04 | 3 | February3,2008 |
| 82.0 | 12.0 | " Don't Ever Change " | Deran Sarafian | Doris Egan & Leonard Dick | 23.15 | 3 | February5,2008 |
| 83.0 | 13.0 | " No More Mr. Nice Guy " | Deran Sarafian | David Hoselton & David Shore | 14.51 | N/A | April28,2008 |
Question:
What is the # when u.s. viewers  (million) is 17.44?
Answer:
1.0