Certification
- Argentina:13
- Australia:PG (some episodes)
- Australia:M (some episodes)
- Brazil:Livre
- Finland:K-18 (2005, DVD, self applied)
- Germany:12 (some episodes)
- Italy:T
- Netherlands:6
- Norway:9 (recommended rating)
- Poland:12
- Singapore:PG (season 3, season 4)
- Singapore:NC-16 (seasons 1 and 2)
- Spain:TP
- Sweden:11 (self-applied)
- United States:TV-PG
- United States:TV-14 (re-rating)
- United Arab Emirates:16+