Step 1 : Introduction to the question "What was the original name of the cable television network HBO?"
On this day in 1972, the premium cable TV network HBO (Home Box Office) made its official debut with a showing of the movie "Sometimes a Great Notion" starring Paul Newman and Henry Fonda. Originally called “The Green Channel,” the nation’s first pay TV service got its start using microwaves to broadcast nine hours of programming a day in fewer than 400 New England homes. The Green Channel was quickly renamed Home Box Office to stress the offering of this new channel: films that had never been broadcast on the television before and live showings of sporting events.