1) Empty Spaces

The teaser starts with the camera zooming into multiple empty spaces in a large building with absolutely no trace of people. We do know from the famed podcast of the same name, that the character Heidi Bergman essayed by Roberts works at a secret government facility that helps soldiers cope with civilian life. The background score (Everything in its Right Place by Radio Head) adds to the particularly eerie feeling in the teaser. What do these empty spaces signify?