Christy said that the Charmed Ones wanted to train Billie so they can make her do all the work, but in the episode Malice in Wonderland Billie offered to help them out if they taught her everything they know. So Billie shouldn't act like they used her.
From one shot to another, Phoebe's fingernails either have red polish on them or don't. It is especially obvious when Phoebe's nails are red when she talks to Piper, hears something and storms to the kitchen, and aren't when Phoebe enters the kitchen and finds the little girl.
All the children seen in various clips of Phoebe's dreams and as Piper's grandchildren, they are actually children of most of the crew working on 'Charmed'
Paige mentions Quentin Tarantino as someone she wants to dream about, and in real life, actress Rose McGowan starred in the 2007 film "Grind House" directed by Quentin.
When the girls collapsed after being put to sleep by Billie and Christy, Piper's hand was in between her legs but in a shot shown later on she has it resting on her thigh.
Despite Jason & Kristopher Simmons (Wyatt Halliwell) being listed in the end credits, they did not make an actual appearance in this episode.
TRIVIA: Billie & Christy's combined powers have advanced to the point that Christy has to only hold on to Billie's hand and channel Billie's Projection power by herself - without Billie's help.
Phoebe: Ok. What did Billie say to you at the club?
Piper: She said something about... I kept blowing her up, and... you know... right about now that seems like a pretty fabulous idea!
Phoebe (talking about Billie and Christy): What are we going to do about them?
Piper: We're going to stop them before they stop us.
Phoebe (hears a litte girl's voice calling out to her): Did you hear that?
Piper: Your tall exotic lover?
Phoebe (about Billie & Christy): Piper, why don't you just freeze them?
Piper: Because it wouldn't have worked.
Phoebe: Okay so it's better to just start a war?
Piper: Oh stop, it was one lousy potion. I just meant to scare them. I wasn't gonna take them out with that!
Phoebe: Take them out? Why don't you say what you really mean? Kill them.
Paige (from the other side of room): Girls, be nice!
Piper: When did you become the big sister?
Paige: When you stopped acting like one.
Paige: Witch, whitelighter, wife I give up! How do I juggle all this?
Piper (talking to Billie after she magically appeared in the room): You know considering you want to kill us maybe you should use the front door.
International Episode Titles: Italy: L'uno o l'altro (One or the Other) Germany: Zeig mir deinen Traum (Show Me Your Dream) France: La clef des songes (The Key of Dreams)
On it's original airdate this episode got 3.3 million viewers.
Paige: Why can't I dream about someone cool like...I don't know... Quentin Tarantino?
A reference to the famous director Quentin Tarantino, known for such films as "Pulp Fiction", "Reservoir Dogs", "Kill Bill, Vol. 1" & "Kill Bill, Vol. 2".
Title: The Jung and the Restless
This is a reference to the daytime soap opera The Young and the Restless. Plus Carl Jung was a Swiss psychiatrist and founder of analytical psychology; widely known for introducing the concepts of archetype, and the collective unconscious.
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