The Simpsons on Fox at 8:00pm ET. Tonight is the annual 'Treehouse of Horror' episode, airing the traditional almost two weeks before Halloween because of the World Series.

Sunday Night Football: Philadelphia Eagles at Dallas Cowboys on NBC at 8:15pm ET.

Watchmen on HBO at 9:00pm ET. Series premiere.

Leavenworth on Starz at 9:30pm ET. Series premiere. This is a documentary series produced by Steven Soderbergh about the case of Clint Lorance, currently serving a 19-year sentence for murder based on an incident in Afghanistan where he ordered his platoon to open fire on three locals on a motorcycle.

Mr.Robot on USA at 10:00pm ET.