Why would Phoebe let Billie open the Manor's front door after what Billie did to the cab's door? It came off completely from its hinges when she opened it, since she's a superhero. Surely it was meant to be funny, and it was, but logically, Phoebe shouldn't let her touch anything.
How come Henry doesn't know Paige? She and her sisters exploded in the news when they faked their deaths. And when they came back and they were known to the world as "spies" working for the Homeland Security. Their faces were everywhere, and yet Henry doesn't recognize Paige's face!
The demon Tai is the same one from the season 5 episode The Importance of Being Phoebe. He was guarding the front door of the Manor after Cole takes control of it. When Cole releases the Nexus and absorbs it, Phoebe says the spell to send it back to the ground and takes Cole with it. In result, all the demons in the house are vanquished, so shouldn't Tai be dead?
TRIVIA: Billie makes a reference towards the end of the episode by saying "I'm still a little gun-shy" and it could be a reference to a track from Liz Phair's album "Exile in Guyville", who performs shortly after she says this.
TRIVIA: Liz Phair finally makes an appearance on the series, as her music previously was used in episodes "Secrets and Guys" (the song "Baby Got Going"), "Oh My Goddess" (the song "Extraordinary"), and "It's A Bad, Bad, Bad, Bad World" (the song "Take A Look"). This episode feartures music from her latest album "Somebody's Miracle", and that is also the song performed at P3.
TRIVIA: Actress Jennifer Tung (Zira) previously appeared in the season 3 episode The Demon That Came In From The Cold as Klea.
TRIVIA: This is Billie's first time being transformed.
Henry wants to verify if the story about Speed getting stabbed in the back by one of the fellow robbers is true. When he finds out that it is, he lets him go. Why doesn't he take him to the hospital or doctor before or after he lets him go? At least, Speed has got a stab wound, which he has been walking around with for almost an entire day.
When Piper and Phoebe are seen from the back looking towards the warehouse Phoebe's hands are on her hips. When the scene switches to facing them and Phoebe's just putting her hands on her hips now. The scene goes back to the original view and Phoebe's hands are at her sides. Obviously the two scenes were mixed up and should have showed Phoebe with her hands down and then her hands on her hips.
TRIVIA: This is Ivan Sergei's first appearance as Henry Mitchell on the series.
When Henry and Paige are in the car, the money for the bet is already there ($40) that means Paige does not owe him $20. Later on, Henry is actually the one who owes Paige $40 instead of $20 since he lost the bet.
In the book the demons find at Magic School, Hippolyta is misspelled "Hippolytal."
Why does Mitch take Speed to the police station just to make a call on his cell phone and let Speed go?
Throughout the episode the name Hippolyta (pronounced hip-pahl-i-teh) is mispronounced as Hippo-lee-tah.
TRIVIA: The police station that Mitch takes Speed to, is the same precinct that Darryl used to work at.
TRIVIA: Billie is turned into a superhero just like the sisters were, in the season five episode "Witches in Tights".
Piper (When she sees all the boxes with the files in it): You have got to be kidding me!
Man (off-screen): Hey, superhero babe! Over here!
Billie: Ugh, please someone vanquish me now!
Billie: What just happened?
Phoebe: We're screwed. That's what happened.
Phoebe: Hey, lay off the male bashing!
Zira (about Billie): You can't save her - it's too late.
Piper: Wanna bet?
Henry: You're quite the optimist huh?
Paige: No I just have hope.
Zira (about the dead male demon): I can't believe he's dead, it's almost anti-climactic.
Billie (to Leo): You are such a downer. No wonder I made you invisible.
Piper (while lifting the door off of invisible Leo): Sweetie, honey are you alright?
Leo: Yeah except for the fact that no one can see me.
(After Piper attempts to blow up the belt, Billie gets under its influence for an instant)
Billie: Did you just try and kill me?
Piper: Whoa easy!
Phoebe: Billie relax. Of course not. What's the matter with you?
Billie: I don't know. That was really weird. Please get this off me!
Piper (to Leo about golfing): You should go and you know if you happen to find me a band in the process that wouldn't be such a bad thing.
Piper (about Billie): I can't believe we missed her.
Phoebe: Well at least we left before the whole class killed each other.
Piper: You mean before the girls killed the boys.
Billie (under the influence of the belt): Well I rescued a woman in distress, vanquished a bunch of male demons and I scratched my pretty belt again.
Piper (while trying to bring Billie back): Well we could try the 'to call a lost witch' spell. If there is any witch left in her it should bring her back whether she likes it or not.
Billie in full superhero mode, accidently rips off the front door of the manor. She walks in and Phoebe walks in past her, looking at a shocked Piper and Leo.
Phoebe (to Piper): Yes, she's a superhero, but no you can't get mad at her, cuz it's your fault.
Henry: Let me guess - missionary? Social worker? Do-gooder?
Paige: Homeland Security actually.
Billie, in her superhero mode, accidentally makes Leo invisible.
Piper: Why did you have to go and do that? Who's going to pick up the kids?
Phoebe: Yin/Yang, working together just as it should be.
Piper: Good job Yang.
Leo: Thanks Yin. (They kiss.)
Piper (looking around Magic School for an invisable Leo): Alright, come out, come out where ever you are. (She throws a potion and Leo reappears and they smile at each other.) It's nice to see you.
Leo: It's nice to be seen.
Piper walks over to Leo and they cuddle.
Billie yells and twirls around really fast and manages to escape the crystal cage Piper & Phoebe trapped her in.
Bilile: There's no wrath like a woman scorned! She disappears in a blur.
Piper (to Phoebe where they're hiding behind the couch looking at the messy attic): We have to go find her and bring her back because I'm not cleaning up this mess!
(Piper & Phoebe use a spell to bring Billie to them who arrives in a blur)
Billie: What did you do that for?
Phoebe: We were just worried about you, that's all.
Billie: You just don't want me to create my Utopia. (They crowd around Billie and back her up onto the circular carpet).
Piper: Your what?
Phoebe: Are you kidding? We're into girl power. We love Utopia. We're witches.
Paige & Henry are on a stakeout watching for Speed.
Henry (after Paige's groans and wiggles catch his attention) You all right?
Paige: Yeah, I just got to use the bathroom, is all.
Henry (reaches into the back seat for a portable coffee mug): Here you go, I won't look.
Paige: That's disgusting.
Piper (to Billie just before blurs out of house): Oh hey! Could you make Leo visisble again, before you go?
Phoebe (under the powerful influence of the belt): Really? Why?
Piper (also under the belt's influence): Well he's got to play golf apparently, in order to get me a band. So what can I tell you? It's a man's world. (Leo chuckles.)
Bilie: I guess I could try. (zaps Leo with lightening bolts and he reappears.) It worked! Right on!
Billie (referring to the magical belt): Okay. Hi. Yeah. I can't get this thing off.
Phoebe: Don't even bother, it's going to take a spell, a potion or an emotional epiphany.
Billie: That blows. Are you sure?
Phoebe: Hello? Voice of experience. I've been turned into a mermaid, a mummy and a genie. Trust me I know these things.
Phoebe (ranting to Billie as they walk): This is unbelievable. Piper takes the car, Paige orbs, but does anyone stop to think that Phoebe can't orb? No, of course not! Why? Because it's all about them!
Paige: Believe it or not, I'd rather be helping you right now, then be where I am.
Phoebe: Why, where are you?
Paige: I'm uh...on skid row, trying to figure out how to introduce myself to my new charge.
Phoebe: Well, what's stopping you?
Paige: Just have to wait for the other felon to leave first.
(Piper & Phoebe are in a storage room full of cold cases)
Piper (talking about Agent Murphy) He can't make us do this on a weekly basis, it's boring.
Phoebe: Well... if he does, we'll just turn him into a frog or something.
Phoebe: I'm very busy too. I have dates, lots & lots of dates.
Piper: Are you trying to get pregnant again?
Phoebe: No. I'm trying to find love.
Phoebe (talking about Agent Murphy) He's got case files for us.
Paige: What are we, Charlie's Witches? We don't work for him.
Phoebe: Apparently he seems to think that. Especially reminding me over & over, he bailed us out of our little jam.
Piper: That's blackmail.
Phoebe: No, that's your taxpayers dollars at work.
International Episode Titles: La battaglia dei sessi (The Battle of Sexes) Germany: Yin und Yang (Yin and Yang) France: La femme est l'avenir de l'homme (The Woman is the Future of the Man)
This episode got 4.38 million viewers on its original broadcast.
Billie is referred to as a "Wonder Witch" - this is a reference to the superhero Wonder Woman.
Paige: What are we - Charlie's Witches?
This is a reference to the 1970's TV series "Charlie's Angels" (which was also made into two films). This is also a nod towards Aaron Spelling who is the creator and executive producer of both series.
Title: Battle of the Hexes
This is a reference to the common phrase "battle of the sexes". The phrase was also used as the title of the 1959 Charles Crichton film "The Battle of the Sexes", starring Peter Sellers, Robert Morley & Constance Cummings. It was based (very loosely) on a short story, "The Catbird Seat", by James Thurber (New Yorker 1942), and subsequently anthologised.