Certification
- Argentina:18
- Australia:MA15+
- Brazil:14
- Canada:14A (DVD rating)
- Canada:G (Quebec, DVD rating)
- France:16
- Germany:16
- Mexico:C
- Netherlands:12
- New Zealand:R16
- United Kingdom:15 (most episodes)
- United Kingdom:18 (season 3, disc 1)
- United States:TV-14
- United States:TV-MA (uncensored)