Satellite
The two largest satellite services have different parental controls that you can use. DirecTV:
DirecTV’s Locks and Limits feature allows you to block by MPAA ratings, specific movies, and entire channels, as well as to set limited viewing times and establish spending limits on Pay-Per-View. DISH Network: DISH Network subscribers must use the v-chip to block television programs according to their rating. Additionally, you can block adult channels using their Adult Guard feature, found in the Locks menu.
Using Parental Controls