Certification
- Australia:M (some episodes)
- Australia:PG (some episodes)
- Brazil:10
- Canada:14A (Manitoba/Nova Scotia, DVD rating)
- France:Tous publics
- Germany:12
- Italy:T
- New Zealand:M
- Norway:11 (DVD rating)
- Singapore:PG (season 1, season 3)
- Singapore:M18 (season 2)
- Sweden:11 (DVD rating)
- United Kingdom:12
- United States:TV-14