The five parts' subtitles are based on the train station's PA announcements.

One hears recordings of clattering trains slowly stopping on arrival, doors of cars shutting, PA announcements, whistles, people running to get their train.

Sal Viscuso's first PA announcement on the show is a reference to this.

The colonists instantly fell silent, already knowing from experience that talking during the PA announcements resulted in instant pain.

The PA announcements were bewildering, impossible to understand.

The weapons convention also features bikini-clad girls posing with guns and a PA announcement about a "Peacemaker demonstration".

Katherine was jarred back to Reno by the PA announcement.

The following day's Red Sox game was played with no PA announcements, as a tribute to him.

To encourage participation, student leaders make PA announcements, create and decorate bulletin boards, rally individual classes and lead assemblies.

The PA announcement echoed through the school lobby, and we were off to Phoenix.