Question: Several times in the movie one character is able to ascertain in which hotel room another character is staying simply by asking the front desk for the room number. Was this realistic at the time the movie was made? Today, a hotel would never divulge a guest's room number to a stranger, since such information could potentially be used by burglars and/or predators to gain access to hotel rooms. Was security really that lax in the 1950s?
Question: Why does the play start with The Van Daans already at the Annex when it's clear that they arrive a week later in the diary?
Question: When the gang explore the ruins of the city, you can hear a low pitch humming noise. What was making that noise?