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 No. | Airdate | Total Viewers | Share | BBC One Weekly Ranking |
| --- | --- | --- | --- | --- |
| 1.0 | 28 August 2007 | 2715000.0 | 18.8% | N/A |
| 2.0 | 29 August 2007 | 2344000.0 | 17.6% | N/A |
| 3.0 | 30 August 2007 | 2366000.0 | 15.8% | N/A |
| 4.0 | 3 September 2007 | 2390000.0 | 17.5% | N/A |
| 5.0 | 4 September 2007 | 2583000.0 | 19.2% | N/A |
| 6.0 | 5 September 2007 | 2367000.0 | 19.6% | N/A |
Question:
What's the share of Episode 1?
Answer:
18.8%