4. Sezon Son 4 Bölüm

Season 4, Episode 20: Cowboys and Indians

Original Air Date—8 May 2009

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Season 4, Episode 21: Rates of Exchange Original Air Date—15 May 2009

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Season 4, Episode 22: Killing Your Number Original Air Date—15 May 2009

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Season 4, Episode 23: The Old Ball and Chain Original Air Date—2 June 2009

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Season 4, Episode 24: Free

Original Air Date—2 June 2009

kaynak: imdb.com