Certification
- Australia:M
- Brazil:12
- Canada:PG (Manitoba/Nova Scotia, DVD rating)
- Canada:14A (Ontario)
- Canada:14A (season 8)
- Denmark:11 (TV rating)
- Finland:K-12 (TV rating)
- France:Tous publics (DVD rating)
- Germany:12
- Ireland:15
- Italy:T
- Japan:PG12 (self-applied)
- Mexico:TV-MA (self-applied)
- Netherlands:9
- New Zealand:M
- Norway:9 (TV rating)
- Poland:12 (DVD rating)
- Singapore:PG13 (season 1, season 2, Christmas special)
- Singapore:NC16 (season 3)
- Singapore:M18 (season 4)
- South Korea:15
- Spain:16
- Sweden:12 (self-applied)
- United Kingdom:12
- United States:TV-PG
- United States:TV-14
- United States:TV-MA (streaming)