On which network did 'Hill Street Blues' originally air?

Where is 'The Dukes of Hazzard' set? Who created 'The Dukes of Hazzard'? On which network did 'Magnum, P.I.' originally air? In what year did 'Magnum, P.I.' premiere? In what year did 'Hill Street Blues' premiere? Who created 'Hill Street Blues'? On which network did 'Knight Rider' originally air? In what year did 'Knight Rider' premiere?