The music in the go-go club scene is by a real band called The Other Half, which included Randy Holden who later played in Blue Cheer. The songs played are Oz Lee Eaves Drops and Bad Day. The LP is a rare and in-demand piece, especially to collectors of 60s psychedelic music.
In Season 1, Episode 1 there is a scene where there are music posters on a door and wall. The one on the door shows a concert featuring Jefferson Airplane and The Jaywalkers.
This episode has some unique points. We get to see Julie's apartment for the first time. Captain Greer has a different hairstyle. You see Captain Greer smoke.
Future Hollywood star Harrison Ford makes an appearance, in a non speaking role.
A car phone is used by the blackmailer after he leaves the restaurant. Mind you this is 5 years before the first cellular phone was created, but car phones had been available since the late 40's.