Lilith says the daggers to kill Lucifer were forged in the city of Megiddo. This is a reference to the Omen movies, where to kill antichrist Damien Thorn, he must be stabbed with the daggers of Megiddo.
The group song is Masquerade from The Phantom of the Opera
When he first meets Dorian, Lucifer says "Don't you recognize me Mr. Gray?". Luke Cook (the actor who plays Lucifer) previously played the character Dorian Gray in an episode of the TV series The Librarians (2014).
Lilith is seen dropping a basket of pomegranates. This is a reference to the forbidden fruit eaten by Eve. Contrary to popular belief, it was a pomegranate, not an apple, that was offered to Eve. The name "pomegranate" derives from the Latin pomum ('apple') and granatus ('seeded'), which is likely how the belief it was an apple came about.