When Piper is talking to Phoebe about not being the first Halliwell to fall for a demon she is of course referring to herself. Jeremy was Piper's fiance and a warlock she helped vanquish in the first episode of the series.
TRIVIA: The grieving widower is shown holding his deceased wife's photo and crying just before the Banshee kills him. The actor playing the widower is Newell Alexander and the woman in the photo is actually his real-life wife, Rosemary Alexander.
In this episode a Banshee is someone who feeds on the pain of others and kills with it's scream. However, in true Irish folklore a Banshee's scream, is to either foretell or let it be known that a death has or is about to occur.
TRIVIA: This is the 5th time that one of the sisters turned into something evil.
When Piper and Leo are talking on the bed in their bedroom, Piper's hair keeps going from over her shoulder to behind her back.
TRIVIA: This is the last episode to feature Kit, the Charmed Ones' cat. However, she does appear again for the official final time in the season 5 episode Cat House, when her sudden unexplained disappearance is finally answered.
At the beginning of the episode Phoebe is writing in the book and the page is shown. The title says "Cole's human form", but it doesn't make sense - there's Cole (the human form) and Belthazor (the Demon) so Cole would be the Belthazor's human form not Cole's human form.
When the Alchemist cuts Cole's arm, a drop of blood is visible on the end of the knife even before he cuts him. This is probably "stage" blood on the underside of the knife meant to give the appearance of a cut when the Alchemist draws the knife along Cole's arm.
TRIVIA: This episode marks the final time Prue, Piper and Phoebe are shown together at P3.
TRIVIA: This is the second time that Prue gets transformed into something by her own spell, the first time was in the season 2 episode "She's A Man Baby, A Man!".
TRIVIA: In this episode the sisters face a demon that has no vanquishing spell in the Book of Shadows but Piper manages to use her new power and blow it up instead.
TRIVIA: The song played at the end of the episode is "Breathless" by The Corrs.
TRIVIA: The song played during the opening credits is Give Me A Reason by The Corrs, featured on their CD In Blue.
After the commercial break right after Cole shimmers out with Banshee Phoebe, Piper has her coat on, but it's clear that time hasn't passed enough for her to want or need it.
When Phoebe throws Belthazor in the mausoleum, his bare leg is seen for an instant. It is not red like the rest of his skin, but rather the natural tone of the actor's.
When Phoebe is writing in the book about Cole being the human form of Belthazor, she is actually writing with what looks like a "Sharpie" marker. Later, when she is downstairs and says she's writing about his demon side, she is moving the pen, but it is clearly an inch or so above the book.
When Piper is in her room relaxing to the tape and Leo orbs in she blows it up with damage to the right tape deck but right after that she puts the fire out with the extinguisher the right tape deck has no damage.
When the dog version of Prue runs to the front door to get out, it's quite visible that the animal is in fact a male dog.
Piper: Leo! Don't orb in! Knock first!
Leo: But I live here!
Piper (to Leo while gesturing to her radio): Honey, you made me blow up my guru!
(A runaway teenage girl is inside a phone booth with the sounds of dogs barking around her)
Runaway Teen (crying): Dad, are you there? Pick up, please. It's me. (pause) Mom! Oh, thank god. I'm so sorry; I never should've run away. I wanna come home. (looks around, having evidently been asked her current location) I don't know. Somewhere in San Francisco.
(Off camera, Phoebe as the banshee screams)
Piper: Phoebe's home!
(Phoebe jumps on Cole and they start to fight)
Phoebe: He hits you, you hit on him. It's only fair.
Prue: Hey, how could I resist a guy who put up fliers to find me?
Prue: What are you doing?
Piper: I think you got fleas.
Prue: You know what, that's so not funny, because I think I do.
Piper: I think you do.
Prue: Okay, you have no idea how hard it was being a dog. Okay? I mean peeing outside, eating everything and anything, and just smelling everything.
Piper: Must have been rough, no pun intended.
Prue: Well, at least I got to meet a really cute guy.
Piper: You met a guy?
Piper: As a dog?
Prue: Well, he ran me over.
Prue: Hey, Leo, not that I'm complaining, but why am I human again?
Piper: Okay, could you give me all the bad news at once? Do you have to keep doling it out for dramatic effect?
Piper: Prue is walking around on all fours and barking. If that's not a backfire, then what is?
Phoebe: Actually, inspector, we're witches. Okay? We actually think a demon might have done this, probably my ex-boyfriend. And if he did do this, then we have to find him and vanquish him. Satisfied?
Inspector: That's very funny.
Phoebe: Do you see any scorch marks by where the body was?
Prue: I don't think that there would have been a body...if that particular weapon had been used.
Prue: Why? Is she still locked in the basement?
Phoebe: No, she's locked herself in her bedroom now.
Prue: Well, at least somebody's improving.
Prue: And two sisters who need you to cook for them and fight evil with them.
Phoebe: Okay, do you want her to come up, or do you want her to stay down there?
Prue: Jeez, who let the dogs out?
Prue: All right. Where is she?
Phoebe: In the bunker formerly known as the basement.
Prue: I thought she was getting a handle on her new powers.
Phoebe: Yeah, that was before her new powers got a handle on her.
Prue: I am not saving myself for Mr. Right. I mean Mr. Interesting would do, or Mr. Personality, or even Mr. Take-My-Breath-Away. I don't care.
Piper: It's good to see you out, it's been a while.
Phoebe: Yeah, I guess we're both out of hiding. You know, I've been wanting to thank you.
Phoebe: Calling Cole. I mean, if you hadn't I'd probably still be screaming.
Piper: Yeah, well, nothing like trusting your instincts.
Phoebe: I know what you mean, I think I'm gonna act on some of my own.
Piper: Do I even wanna ask?
Phoebe: I think I made a mistake giving up on Cole. I now know why he did what he did.
Phoebe: He loves me, which means that there's still good in him. I can bring him back, I know I can.
Leo: You can do this, Piper.
Piper: No, actually, I can't. See 'cause Prue and Phoebe are the super witches and I just tag along and freeze things, and now I can't even do that right.
Piper : Am I okay? Prue is a dog and Phoebe is a Banshee. I am not even in the vicinity of okay.
Leo: So, the Banshee's scream doesn't kill witches, it turns them into Banshees.
Cole (to Leo): I suggest you orb her out of here, whitelighter, before there's nothing left to orb.
Cole denies Piper for saving his beloved Phoebe.
Piper: Not even for somebody you love?
Cole: Loved. Past tense.
Piper (to Leo about Cole & Phoebe): Feelings like theirs don't go away. We should know. (Piper turns to the spell in the Book of Shadows) Magic forces black and white, reaching out through space and light, be he far or be he near, bring us the demon Belthazor here.
A tunnel of wind appears in the room and Cole appears.
Cole: You rang? Piper? Not the sister I was expecting.
Leo: Honey, just try and relax.
Piper: Would you stop telling me to relax! (Piper blows up a sewing machine.) That was Grams' sewing machine!
Phoebe (about Prue changed into a dog.): Oh, she's such a pretty dog.
Piper: What else did you expect?
Leo: A Doberman?
Prue growls and barks at Leo.
Piper (talking about the banshee): So what do we do, wear earplugs?
Prue (to Phoebe): I think that you're barking up the wrong demon.
Prue and Phoebe are talking to Piper, who's in the basement, through the closed door.
Prue: Can we come down?
Piper: No. Stay away from the door, it's not safe.
Phoebe: Piper, that's ridiculous, we're your sisters. (to Prue) Maybe we should back up just a little.
Phoebe (to Prue): You can't keep saving yourself for Mr. Right. I need more vicarious thrills than that.
Phoebe: I'm single again, so I have no choice but to live vicariously through your love life.
Prue: Wow, I'd forget about my love life if I were you, lately mine's been rated PG for pretty grim.
The banshee goes for Piper but Piper blows her up.
Piper: Ha, shut her up.
Piper: We need your help. Phoebe's been turned into a Banshee.
Cole: A Banshee? Huh...that's different.
Piper blows something up in the basement.
Phoebe: Are you okay?
Piper: I'm fine. The Christmas decorations are not.
(Prue, as a dog, is chasing the Halliwell's cat, Kit, up the stairs)
Piper (to Prue as a dog): Prue, no! No-no-no-no, very bad, Prue. Very, very bad Prue.
Piper: Hey, Cujo, who you growling at?
Leo: I'm gonna go check with the Elders.
Phoebe: Wait a minute, don't tell me you're afraid of Prue.
International Episode Titles: Czech Republic: Kdopak to štěká (Who's Barking) France: Indestructible (Indestructible) Italy: Ascolta il tuo cuore (Listen to your heart) Germany: Die Todesfee (The fiary of death)
This episode scored 4.7 million viewers.
Joe E. Tata and Shannen Doherty reunite from their days on the TV series Beverly Hills 90210.
Title: Look Who's Barking
This is a reference to the film "Look Who's Talking".
Phoebe (to Piper, after she accuses Phoebe of being in denial about her feelings for Cole): Okay, well... If you'll forgive me, Dr. Laura, I have a different demon to worry about.
This is a reference to Dr. Laura Schlessinger who hosts a syndicated radio call-in show and is a counselor specializing in marriage, family and children.
Prue: Geez, who let the dogs out?
This is a reference to the song "Who Let the Dogs Out?" by the Baha Men.
Piper: Hi, Cujo, who you growling at?
This is a reference to the 1983 movie "Cujo" about a St. Bernard that contracts rabies and goes crazy, terrorizing a small town in the US. It was based on the novel by Stephen King.