When Gayle looks at the synagogue board, there is an event with two speakers listed: Rabbi Reiff and Cantor Voris. This is a reference to the series writers Ethan Reiff and Cyrus Voris.
On the skyline going into DTLA (28:21) you can see the rare sight of signage from a by then defunct TWA on a building - this may be stock footage (unlikely by look of it) or the sign was have still up at the time. This is interesting as TWA was a longtime target of terrorists.