Certification
- Australia:MA15+ (DVD rating)
- Canada:14A (Manitoba, DVD rating)
- Canada:PG (Ontario, season 1, DVD rating)
- Canada:18A (Ontario, season 4, DVD rating)
- Canada:13+ (Quebec)
- Canada:14+ (some episodes)
- Canada:18+ (some episodes)
- Denmark:15
- Finland:K-16
- France:Tous publics (most episodes)
- France:10 (some episodes)
- Germany:16
- India:15+
- Indonesia:20+ (self-applied)
- Ireland:15
- Italy:VM14
- Mexico:16
- Netherlands:16
- New Zealand:R16 (DVD rating)
- New Zealand:R13 (some episodes)
- Norway:15
- Philippines:R-16
- Poland:16
- Russia:18+
- Singapore:M18 (season 1)
- Singapore:R21 (season 2, series level)
- South Africa:16+ (self-applied)
- Spain:16
- Sweden:15
- Thailand:15+ (self-applied)
- Turkey:18+ (self-applied)
- United Kingdom:12 (some episodes)
- United Kingdom:15 (some episodes)
- United States:TV-MA