Of course, this is Monterey we're talking about, so the party was riddled with drama (Nathan and Ed! Celeste and Madeline! Elizabeth and Bonnie!), but it was also packed with on-theme style that's sure to fuel us for the next five Halloweens straight. The disco party — and the looks each character showed up in — would have been the highlight of the episode... if not for the slap heard 'round the world