When Castle and Beckett first interview Matthew's family, Rosie, the daughter, is wearing a shirt that says 'Hayley Blue.' Hayley Blue is the pop star that's murdered in the following episode.
Castle: I had no idea you were interested in comic books. Beckett: Oh, Castle, the things you don't know about me could fill a book.
Beckett: Are you kidding me?! Is that a stake in his heart?! Castle: Looks like Buffy's visiting the Big Apple.
Ryan: Yeah, vampire coven is like joining a church or a club. You like to play golf, I like to play golf. You like to drink blood, I like to drink blood… what? I used to go out with a girl who was into the lifestyle. Esposito: What happened? Did the relationship suck? Ryan: Deal breaker. She wanted to have sex in a coffin. I'm open-minded but I'm not that open-minded.
Castle: He reminds me of early Frank Miller. Beckett: Which Frank? Epic Comic or Dark Horse Years? Castle: Oh my god, that is the sexiest thing I have ever heard you say.
Castle: If he is a vampire and you pull that out, he comes back to life. Lanie: If he does then we can all go home early.
International Episode Titles: Czech Republic: Upíří víkend (Vampire Weekend)
Original International Air Dates: Slovakia: September 21, 2010 on JOJ United Kingdom: October 27, 2010 on Alibi Germany: October 29, 2010 on Kabel Eins The Netherlands: November 25, 2010 on SBS 6 Finland: November 28, 2010 on Nelonen Czech Republic: January 5, 2011 on Prima
Featured Music: "Pure Pleasure Seeker" by Moloko
Nathan Fillion(the actor who plays Richard Castle) previously wore clothing similar to Castle's Halloween costume in his role as "space cowboy" Captain Malcolm "Mal" Reynolds in the 2002 television series Firefly and its 2005 film Serenity. Also, when Castle first comes out in costume, a slide guitar is played in the background similar to the one used in the Firefly theme song and score. There is also a prop from the same show behind him on a shelf.
Also, Molly Quinn (who plays Castle's daughter Alexis) mentions that he wore the same costume five years ago and that he should move on, a reference to the fact that Fillion has not played Reynolds since Serenity.
Halloween Costume Fun: Castle as space cowboy Det. Ryan as (dead) doctor Det. Esposito as modern US soldier All of these costumes are references to parts the actors have played before. Nathan Fillion was space cowboy Capt. Mal Reynolds from Firefly. Seamus Dever was a doctor on both General Hospital and Army Wives. Jon Huertas played Sgt. Espera in the HBO series Generation Kill. He served for 8 years in the US Air Force.
Dressed as a flapper for a Halloween masquerade, Martha tells Alexis and Castle that she hopes to meet her "Gatsby" at the party that night. The Great Gatsby was a novel written by F. Scott Fitzgerald (1925) critiquing the American Dream. In the novel, Gatsby is a multi-millionaire bootlegger.
Castle: (When he sees the body at the cemetery) Looks like Buffy visited the Big Apple. Buffy is the title character of Joss Whedon's Buffy the Vampire Slayer (1997-2003) played by Sarah Michelle Gellar in the series. Previously, the role of Buffy was played by Kristy Swanson in the 1992 movie version. Nathan Fillion himself guest-starred as Caleb on the last season of Buffy.
(about the murder victim, who looks like a staked vampire) Kate: Who would go to the trouble of killing someone that way? Richard: Lycans. They've been in war with the Vampires ever since Lucian was murdered in the 15th centu... Reference to the Underworld film series; Underworld (2003), Underworld: Evolution (2006) and Underworld: Rise of the Lycans (2009). The films tell the story of the war between the Vampires and Lycans. Lucian is apparently killed in an early battle of the war, but actually faked his death. This is one of the lead plot lines of the entire series.
S 4 : Ep 23
Aired 5/7/12
S 4 : Ep 22
Aired 4/30/12
S 4 : Ep 21
Aired 4/16/12
S 4 : Ep 20
Aired 4/2/12
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