Certification
- Australia:M (some episodes)
- Australia:PG (some episodes)
- Australia:MA15+ (some episodes)
- Denmark:15 (DVD rating)
- Finland:K-12 (DVD rating)
- Iceland:12
- Netherlands:12
- New Zealand:M (season 1)
- Norway:11 (DVD rating)
- Sweden:11 (DVD rating)
- United Kingdom:15
- United States:TV-MA