The investigation was conducted
Season 4
Episodes
1. Episode 1
7.0
February 6, 2009
45 min
2. Episode 2
7.0
February 13, 2009
45 min
3. Episode 3
7.0
February 20, 2009
45 min
4. Episode 4
7.0
March 6, 2009
45 min
5. Episode 5
7.0
March 20, 2009
45 min
6. Episode 6
7.0
March 27, 2009
45 min
7. Episode 7
7.0
April 3, 2009
45 min
8. Episode 8
7.0
April 10, 2009
45 min
9. Episode 9
7.0
April 17, 2009
45 min
10. Episode 10
7.0
April 24, 2009
45 min
11. Episode 11
7.0
May 22, 2009
45 min
12. Episode 12
7.0
May 29, 2009
45 min
13. Episode 13
7.0
June 5, 2009
45 min
14. Episode 14
7.0
June 11, 2009
45 min
15. Episode 15
7.0
June 19, 2009
45 min
16. Episode 16
7.0
June 26, 2009
45 min
17. Episode 17
7.0
September 11, 2009
45 min
18. Episode 18
7.0
September 18, 2009
45 min
19. Episode 19
7.0
September 25, 2009
45 min
20. Episode 20
7.0
October 9, 2009
45 min
21. Episode 21
7.0
October 16, 2009
45 min
22. Episode 22
7.0
October 23, 2009
45 min
23. Episode 23
7.0
November 13, 2009
45 min
24. Episode 24
7.0
November 20, 2009
45 min
25. Episode 25
7.0
December 18, 2009
45 min
26. Episode 26
7.0
December 25, 2009
45 min
