Certification
- Australia:MA15+
- Australia:M (seasons 2-4, DVD rating)
- Brazil:14
- Canada:G (Quebec)
- Netherlands:6
- New Zealand:M
- Russia:16+
- United Kingdom:15
- United States:TV-14
- United States:16+ (Coarse language, new rating)
- United States:16+ (L, suggestion, new rating, Crude Humor)