Though the real H.H. Holmes did have a preference for petite blonds, the remains of over 200 people of all ages and both genders were found in the infamous Murder Castle.
In this episode, Jo commented that Moyamensing Prison was built in 1835 and torn down in 1963. In truth, Moyamensing was constructed between 1832-1835, but was actually demolished in 1968.
In the scene where Sam and Dean are opening the door to the drainpipes and the camera is looking up at them, Dean hands Sam a rifle with his hand on the rifle. But when the camera changes to above ground Dean is holding on to the butt or handle of the rifle and Sam grabs the barrel
One of the photographs on the table when Sam, Jo, and Dean are discussing Holmes is actually a photograph of Elizabeth Stride, one of the women generally accepted to have been murdered by Jack the Ripper.
Trivia: Jo's middle name is Beth.
H. H. Holmes had blue eyes, unlike the brown eyes depicted in the episode. Also, when he did sport facial hair, it was normally a moustache.
Dean: You know, you shouldn't lie to your mom. You shouldn't be here, either.
Jo: Well, I am, so untwist your boxers and deal with it.
Jo: (about school) I didn't belong there! I was a freak with a knife collection!
Jo: What are you going to do? Going to chain me up in the basement?
Ellen: You know what? You've had worse ideas than that recently.
Dean: Young girl's been kidnapped by an evil cult.
Sam: Yeah. The girl got a name?
Dean: Katie Holmes.
Sam: That's funny. And for you, so bitchy.
Dean: My dad started me in this when I was so young, I wish I could do something else.
Jo: You love the job.
Dean: Yeah, but I'm a little twisted.
Jo: You don't think I'm a little twisted, too?
Jo: Three weeks ago, young girl disappears from a Philadelphia apartment. (offers Dean the file) Take it, it won't bite.
Dean: No, but your mom might.
Jo: You ripped off a cement truck?
Dean: I'll give it back.
Sam: So, this job as glamorous as you thought it would be?
Jo: Except for all the pee-your-pants scares, yeah, sure.
Jo: (on the phone) Thanks, Ash, and if you breathe a word of this to Mom… that's right. I will. With pliers.
Dean: We rarely drink before 10, anyway.
Sam: Where'd you get all that money from, anyways?
Jo: Working at the Roadhouse.
Dean: Hunters don't tip that well.
Jo: Well, they aren't that good at poker, either.
Dean: (answers the phone) Yeah.
Ellen: You lied to me. She's there.
Ellen: No, Ash told me everything. The man's a genius, but he folds like a cheap suit. Now you put my damn daughter on the phone.
Dean: She's gonna have to call you back, she taking care of... feminine business.
Ellen: Yeah, right. Where is she? Where is she?!?
Dean: Look, we'll get her back.
Ellen: Get her back? Back from what?
Dean: The spirit we're hunting, it took her.
Ellen: Oh my God.
Dean: She'll be okay, I promise.
Ellen: You promise. That is not the first time I've heard that from a Winchester.
Jo: So you gonna buy me dinner?
Dean: What are you talking about?
Jo: It's just if you're gonna ride me this close, it's only decent you buy me dinner.
Dean: Oh, that's hilarious.
After Jensen Ackles and Jared Padalecki pulled a prank on Kim Manners by shoving him down a phony sewer pipe, he planned his revenge carefully. A week later, Manners changed the shooting schedule to have the boys climbing down a ladder into the sewer system at the end of the day. The ladder was a set piece with no way out and when Jensen and Jared were at the bottom of it, the crew drenched them with two five-gallon buckets of water. Jensen Ackles fondly remembers the prank: "That was a nice one!"
International Air Dates:
Denmark: January 7, 2007 on TV3
UK: March 11, 2007 on LIVING
Portugal: April 16, 2007 on AXN
France: October 1, 2007 on TF6
Germany: January 28, 2008 on Premiere Serie
Italy: July 8, 2008 on Rai2
The Netherlands: January 11, 2009 on Net 5
New Zealand: February 27, 2009 on TV2
Music: Cold as Ice by Foreigner, Surrender by Cheap Trick, and Smoke On The Water by Deep Purple (Dean's ringtone)
Dean: I think I know what we're dealing with here. It's the Stay Puft Marshmallow Man.
Referring to the 1984 film Ghostbusters, in which the final battle was against a giant marshmallow man.
Dean: Katie Holmes.
Referencing the popular belief of Scientology which Katie Holmes and her fiance Tom Cruise practice.
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