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| Series | Episodes | Originally aired | |||
|---|---|---|---|---|---|
| First aired | Last aired | ||||
| 1 | 20 | 15 May 2004 (2004-05-15) | 6 September 2005 (2005-09-06) | ||
| 2 | 20 | 10 October 2005 (2005-10-10) | 6 June 2006 (2006-06-06) | ||
| 3 | 30 | 14 June 2009 (2009-06-14) | 12 February 2011 (2011-02-12) | ||
| 4 | 22 | 22 December 2013 (2013-12-22) | 6 December 2014 (2014-12-06) | ||
