Star Trek: Enterprise

Australia - PG (Parental guidance is recommended for young viewers.)
PG content can only be broadcast between 9:00 a.m. and 4:00 p.m. and between 7:00 p.m. and 5:00 a.m. on weekdays, and between 10:00 a.m. and 5:00 a.m. on weekends.

Australia - M (Recommended for mature audiences.)
M content can only be broadcast between 8:30 p.m. and 5:00 a.m. on any day, and additionally between 12:00 p.m. and 3:00 p.m. on school days.

Canada - PG
Parental guidance. Again, similar to the movie rating of the same name. Moderate use of violence and mild profanity allowed, as is brief nudity and sexual references if important to a storyline.

United Kingdom - PG (Parental Guidance)
Unaccompanied children of any age may watch. A 'PG' film should not disturb a child aged around eight or older. However, parents are advised to consider whether the content may upset younger or more sensitive children.

United States - TV-PG (Parental Guidance Suggested)
This program contains material that parents may find unsuitable for younger children. Many parents may want to watch it with their younger children. The theme itself may call for parental guidance.

Brazil - 12
Canada - G
New Zealand - M

Singapore - PG