Main Cast
Seasons
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Season 1
4 episodes
2005
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Season 2
14 episodes
2005
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Season 3
12 episodes
2006
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Season 4
4 episodes
2007
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Season 5
12 episodes
2007
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Season 6
4 episodes
2008
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Season 7
10 episodes
2008
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Season 8
4 episodes
2009
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Season 9
10 episodes
2009
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Season 10
2 episodes
2009
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Season 11
5 episodes
2010
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Season 12
4 episodes
2011
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Season 13
6 episodes
2011
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Season 14
4 episodes
2012
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Season 15
3 episodes
2012
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Season 16
4 episodes
2013
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Season 17
5 episodes
2014
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Season 18
5 episodes
2015
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Season 19
5 episodes
2016
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Season 20
4 episodes
2016
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Season 21
3 episodes
2017