Certification
- Argentina:13
- Australia:G (some episodes)
- Australia:PG (some episodes)
- Canada:PG (Manitoba/Nova Scotia, DVD rating)
- Canada:G (Quebec)
- Germany:12 (TV rating)
- Netherlands:AL (season 1)
- Netherlands:12 (seasons 2 and 3)
- New Zealand:PG (some episodes)
- New Zealand:M (some episodes)
- Poland:12 (self-applied)
- Singapore:PG (some episodes)
- South Korea:12 (season 1)
- South Korea:15 (season 2, season 3)
- Sweden:15 (self-applied)
- United Kingdom:15 (one episode)
- United Kingdom:PG (some episodes)
- United Kingdom:12 (some episodes)
- United States:TV-PG
- United States:TV-14 (some episodes)