'The Simpsons': All the Details About Its 600th Episode

Tonight's Halloween episode is No. 600.

The company created specially designed "Simpsons"-themed cardboard goggles into which you peer at your VR-ready smartphone and take in the virtual reality goodness.

As always, this "Treehouse of Horror" is broken into three segments, the first of which is "Dry Hard," a "Hunger Games" spoof in which Bart and his parched pals are pitted against each other for the reward of accessing Mr. Burns' private water reservoir.