When Christine picks up Mary Beth and Theresa Mallory on a busy street corner, LA's One Wilshire is in the background with the building name plainly visible.
Early in the episode Cagney and Lacey are driving a friend of Lacey in the back seat. Every angle shot looking at Lacey in the passenger seat reveals a metal bar sticking out at least a foot rim the side of the car. The metal appears to be part of the camera mount or side platform for a camera operator to stand on to shoot camera angles focusing on Cagney driving.