I may have to rewatch this episode to see if there are any, but there seem to be some subtle nods to the inspirations for this show in each episode. Just a couple I've noticed:
- Double Indemnity poster in a victim's house
- "Rick's Cafe American" neon sign
- A Maltese Falcon sitting on the desk at the escort service of the first (?) episode.
- A private detective named MacSweeny (from Dashiell Hammett's Red Harvest)