The Days and Nights of Molly Dodd

Here are some things that go bump in the night (4x11)

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It's Halloween morning and Molly returns home from a long night out to discover a strange woman in her apartment. At work, the guest of honor is missing from her own party. After getting some relieving news from the doctor, Molly goes home to find Florence dressed as a pirate with a tray full of candied apples. But the only trick-or-treater who comes to the door is a mysterious transvestite.