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:
| Episode number | Season | Original airing | Total viewers | Audience share (average) | Season viewer average |
| --- | --- | --- | --- | --- | --- |
| 1.0 | Season 1 | 17 February 2008 | 4.2m | 18% | 2.7m |
| 2.0 | Season 1 | 24 February 2008 | 2.5m | 10% | 2.7m |
| 3.0 | Season 1 | 2 March 2008 | 2.3m | 9.4% | 2.7m |
| 4.0 | Season 1 | 9 March 2008 | 2.5m | 10% | 2.7m |
| 5.0 | Season 1 | 16 March 2008 | 2m | 8% | 2.7m |
Question:
What episode number has an audience share of 10%?
Answer:
2.0