Several references to this film, including Angel's red jacket outfit, a leading lady named Judy, and the conversation between Angel and Judy about the "end of the world" show outside the planetarium.
Angel says "68 rooms, 68 vacancies". Later we meet Judy, a young woman who stole a lot of money from a bank and regrets it. But she never leaves the hotel, that is host to evil, alive.
The PI in this episode is named C. Mulvihill, a reference to the corrupt PI and former cop Claude Mulvihill. After being hit by Angel, he wears a bandage on his nose similar to that worn by Jack Nicholson.