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:
| # | Air Date | Challenge | Winner | Test-taker | Passed? |
| --- | --- | --- | --- | --- | --- |
| 1.0 | 18 April 2007 | Pace Car Challenge | Red | N/A | N/A |
| 2.0 | 25 April 2007 | Emergency Braking | Red | Shannan | No |
| 3.0 | 2 May 2007 | Reverse Parking on a busy street | Blue | Virgilia | No |
| 4.0 | 9 May 2007 | Braking on a wet surfaces | Blue | Belinda | Yes |
| 5.0 | 16 May 2007 | Reversing through a grid of cars | Blue | Robert | Yes |
| 6.0 | 23 May 2007 | Night Driving | Red | Naida | N/A didn't sit test |
| 7.0 | 30 May 2007 | 3 point turn on a hill | Blue | Virgilia | Yes |
| 8.0 | 6 June 2007 | Finding a parking spot at Paddy's Markets | Red | Naida | No |
| 9.0 | 13 June 2007 | Country Driving | Red | Shannan | N/A didn't sit test |
| 10.0 | 20 June 2007 | Map Navigation | Red | David | No |
| 11.0 | 27 June 2007 | 4WD Challenge | Red | Sharni | Yes |
Question:
What episode aired on 18 April 2007?
Answer:
1.0