Certification
- Argentina:13
- Australia:M
- Australia:MA15+ (some episodes)
- Brazil:14
- Brazil:12 (some episodes)
- Brazil:16 (some episodes)
- Canada:TV-14
- Canada:G (Quebec)
- Denmark:15
- Finland:K-16
- France:Tous publics
- Germany:12 (DVD rating)
- Iceland:12 (some episodes)
- Italy:BA
- Italy:T
- Italy:VM16 (self-applied)
- Japan:G
- Mexico:B15
- Netherlands:6
- Norway:15
- Poland:15 (DVD rating)
- Singapore:PG
- Singapore:PG13 (season 12)
- Singapore:M18 (season 5)
- South Africa:13
- Spain:13
- Sweden:15
- United Kingdom:15
- United Kingdom:PG (season 3 DVD)
- United Kingdom:15 (seasons 1-2 DVD)
- United States:TV-14
- United States:TV-PG (some episodes)