TRIVIA: The music featured in this episode -
-Join Hands by Groove Armada
While in the underworld Cole told Piper her powers were not effective because she was in the underworld and they didn't. However, this was not her first trip to the underworld she had been to the underworld in season 3 when they went there to save Prue's college boyfriend Tom. Her powers worked while their and while several of the demons had been immune to her freezing that had only been because of their rank, not being in the underworld.
When Piper and Leo are on the floor at the club, Piper reaches up for the phone before it even starts ringing.
TRIVIA: The picture of Phoebe and Cole that Paige destroys was also seen in other episodes.
TRIVIA: When the group are at P3 at the beginning of the episode, the song "Can't Get You Out Of My Head" by Kylie Minogue plays in the background. Kylie Minogue is the sister of Dannii Minogue, who was married to Julian McMahon.
TRIVIA: Phoebe gets a job as an advice columnist at the Bay Mirror newspaper and thus begins her "Ask Phoebe" career.
Why wouldn't Paige think something was up when Leo, who was actually Cole in disguise, walked out the front door instead of orbing out?
TRIVIA: Rebecca Balding previously appeared as 'Aunt Jackie' in the season 1 episode "The Fourth Sister" and this is her first appearance as 'Elise Rothman'.
Why would the Charmed Ones have a white dollhouse, the one Paige incinerated, in their attic when in the season 7 episode "Scry Hard", it's stated that as kids they played with a manor-replica dollhouse?
Whitelighters can sense the pain of their charges, so why couldn't Leo sense that Paige was in trouble when Cole was messing with her in the attic? He should have known and orbed in to see what Cole was doing.
When the camera pans out while Cole is on the phone in the attic after scaring Paige, you can see that Paige is not there at all.
When Cole gives Phoebe the chocolate, he has it held in his hand for a few minutes. When the camera angle changes and he walks in to talk to Karen, the chocolate has disappeared from his hand.
Karen: You told Fearful Marin to get a dog.
Phoebe: Yeah, oh, I know, I know, it seemed right at the time, you know, so she didn't have to...
Karen: I would've told her to get a therapist and get a life.
Piper: See, this is what I said.
Karen: Hers was better.
Phoebe: Wow, really?
Karen: It was proactive, it was nonjudgmental. The whole column had a freshness and a passion that it hasn't had for a really long time.
Phoebe: Thank you.
Karen: And I'm going to tell Elise that you wrote it.
Phoebe: Oh, no, Karen, don't do that. I mean, she'll fire you.
Karen: And my guess is she'll hire you. If you think you can handle working for that witch.
Piper: Hmm, I thought of her as more of a demon.
Paige (to Cole): Strange. You didn't last two hours at legal aid.
Piper: Yeah, you hated it. You said you hated being a lawyer.
Cole: Yeah, but that job was high stress and paid nothing. This one—
Leo: Comes with a Porsche.
Cole: Right. (About Phoebe) How come she's not smiling?
Leo: You got me. Is this the Tiptronic?
Cole: Uh, no. (To Phoebe) I thought you'd be happy.
Phoebe: Cole, if you're happy, I'm happy.
Seer: What do you mean she didn't eat it?
Cole: I mean I thought shoving it down her throat might be a little suspicious.
Phoebe: How do you spell 'oblique'?
Piper: With spellcheck.
Phoebe: Speaking of looking forward... Piper, you're going on your honeymoon tonight. I think new lingerie is in order.
Piper: You always think new lingerie is in order.
Phoebe: Not for me, silly. You wanna come, Paige?
Paige: Ugh, I can't. I have to go to that evil place where they keep my paycheck.
Phoebe: Oh, right, sorry.
Paige: I can't believe I destroyed the house.
Phoebe: What I can't believe is what you almost saw in the hotel room. If you had gotten there five minutes earlier...
Piper: Lalala! Oversharing.
International Episode Titles: Czech Republic: Páté kolo u vozu (Third Wheel) France: Noces noires (Black wedding) Italy: La ruota di scorta (The fifth wheel) Germany: Das fünfte Rad (The fifth wheel)
This episode scored 4.8 million viewers.
This episode is also known as The Fifth Halliwheel but it's not the official title that was released on the DVD sets.
Title: The Fifth Halliwell
This is a reference to the term a "fifth wheel" which refers to a four-wheeled vehicle, and it's unneccessary fifth wheel. In this case it refers to two sets of couples and an extra person who feels like the "fifth wheel" or the odd man out.