How can I control access to certain programs on TV?

Settings provides robust Parental Controls including the ability to lock shows by TV Rating, Movie Rating or Channel.  In addition you can lock out individual shows, including recorded programs, from action menus for each show in the main menu.  The system records scheduled shows that are blocked by parental controls, but you must enter a pin before you can watch them.  Parental Controls also allows you to turn on the option to have a PIN prompt before any VOD or PPV purchase.