Lucifer Morningstar has decided he's had enough of being the dutiful servant in Hell and decides to spend some time on Earth to better understand humanity. He settles in Los Angeles - the City of Angels.
In locksmith jargon, a 999 key refers to a master key or one that opens a specific series of locks. However, in the LAPD, a 999 key refers to a key issued to LAPD officers and some civilian employees that opens the employee (rear) entrance to all LAPD stations. All of the keys are identical, open every station's rear door, and are not individually serialized, or traceable to a specific employee or vehicle.
Lucifer Morningstar:
I love L.A. Even the homeless have an IMDb page.
The pilot establishes that Lux is located in the same building as the El Capitan Theater in the 6800 block of Hollywood Boulevard, but subsequent episodes use aerial establishing shots of the Sunset Tower Hotel over two miles away on Sunset Boulevard for Lucifer's penthouse, which is supposedly in the same building as Lux.
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