Certification
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Australia:MA15+
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Canada:14+
-
Canada:14A
(Manitoba, DVD rating)
-
Canada:18A
(Ontario, DVD rating, seasons 3-5)
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Germany:16
(internet)
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Netherlands:12
-
Netherlands:6
(season 1)
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New Zealand:R16
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United States:TV-14
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United States:TV-MA
(some episodes)
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United Arab Emirates:Not Rated
(self-applied)