Certification
- Australia:M (season 1)
- Australia:MA15+ (seasons 2-13)
- Brazil:14
- Brazil:16 (some episodes)
- Canada:PG (Manitoba/Nova Scotia, DVD rating)
- France:10
- Germany:16
- Ireland:15
- Italy:BA
- Japan:PG12 (self-applied)
- Mexico:B
- Netherlands:12
- New Zealand:M (season 1)
- New Zealand:R13 (seasons 2-11)
- Norway:15 (DVD rating)
- Philippines:PG-13 (MTRCB)
- Philippines:16+ (self-applied)
- Poland:12
- Portugal:12AP
- Russia:16+
- Singapore:NC16 (season 1, season 5, Netflix)
- Singapore:PG13 (season 2, season 4)
- Singapore:PG (season 3)
- South Africa:13 (DVD rating)
- Spain:12
- Sweden:15 (self-applied)
- Turkey:7+
- United Kingdom:15
- United States:TV-14
- United States:TV-PG (some episodes)