Prohibition, the latest documentary from Public Television filmmakers Ken Burns and Lynn Novick, will debut on the PBS app for iOS devices nine days before being shown on television, CNet reports. The first of three parts of the five-and-a-half-hour film will appear tomorrow (Friday), while it won't debut on television until Sunday, October 2nd. A 30-minute preview of the movie, along with a question-and-answer session with the filmmakers, is already available on the PBS app and website.