Sam (Jared Padalecki) and Dean (Jensen Ackles) investigate a case in Chicago, where they discover that various mafia-esque monster families are, unknown to humans, running the underbelly of Chicago. One is a family of shapeshifters run by Margo Lassiter (guest stars Danielle Savre), whose leadership is thrown into question when her brother David (guest star Nathaniel Buzolic) returns home. The other reigning family in town is made up of werewolves, lead by Julian Duval (guest star Sean Faris). While in Chicago, Sam and Dean meet Ennis (guest star Lucien Laviscount), a man with a personal vendetta against the monsters. The Winchesters warn Ennis about heading into the hunter lifestyle, but he refuses to listen and starts down a dangerous path.
Ennis Ross is taking his girlfriend Tamara to upmarket restaurant "Il Secundo", with the intent of proposing to her. As he speaks with Maurice the maitre d' about hiding the engagement ring in a glass of champagne, they are interrupted by Sal Lassiter. The matire d' ignores Ennis to accompany Sal to the private club in the back, and as they leave Ennis catches a glimpse of the bodyguard Marv's face in the mirror where his reflection is grotesque.
The private club is full of monsters of different types socialising. At the bar Sal - a shapeshifter - is approached by werewolf Julian Duval, who isn't pleased to see him. They get into a fight, but their bodyguards pull them apart, and Julian leaves. Soon after a masked figure, with what looks like silver claws arrives and starts killing.
Sal is injured and staggers outside to the pier where Ennis is about to propose to Tamara. The creature follows, and as it attacks Sal, it pushes Tamara out of the way. She falls, hitting her head and dies. The creature rips out Sal's heart and flees. As Sal lays dying he says to Ennis "David - I had no choice."
Later at the police station Ennis tries to explain to Detective Costa what he saw but the detective, despite being a friend of Ennis' late father who was also on the force, doesn't believe him. Sam and Dean arrive pretending to be FBI agents. They listen to Ennis' story and then leave, warning him that monsters aren't real.
At the Lassiter home, eldest daughter Margo is consulting with Detective Costa, who is on the Lassiter payroll. He tells her that the ghoul family may not support the Lassiters if she moves against the Duvals. He points out that the other four monster families are looking to take more power now that Margo's father is dying.
David Lassiter, youngest son of the Lassiter family, returns home for the first time in three years after Margo calls to tell him that Sal has been killed. David finds Margo's henchmen preparing a cache of weapons. She is blaming Julian Duval for Sal's death and wants war. David is shocked at how his father's health has deteriorated since he has been away, and he advises Margo against war with the Duvals. Margo mocks him, accusing him of supporting the Duval's because he used to date Violet Duval. She takes delight in telling him that Violet is being married off to a New York werewolf family to forge an alliance.
Julian Duval is meeting with one of the Djinn family, and they discuss how the Lassiters may respond to Sal's death. Violet interrupts, demanding to know if it was Julian who killed Sal. He denies it, and says he doesn't care as long as it brings on a war with the shifters. He reminds her she has no power in the family.
At home, Ennis pulls out a trunk of his father's. He takes out a revolver and finds, hidden in the box, a collection of silver, engraved bullets. He returns to the club behind the restaurant and is confronted by the maitre d'- who is a vampire. Ennis shoots him to no avail. Dean comes up behind the vampire and decapitates it with a machete.
Sam gives Ennis a quick run down on the fact that monsters exists, while Dean discovers stores of blood and flesh behind the bar. The Winchesters theorize that maybe Sal Lassiter was a monster of some sort and plan to head to the morgue to check it out. Ennis insists on accompanying them but they warn him off getting involved.
Returning home, Ennis starts researching Sal Lassiter online, when Freddie Costa knocks at the front door. He comes in and starts asking the same questions he had the night before. Suspicious, Ennis manages to sneak a picture of Freddie, and he notices his eyes flare in the photo, which Sam and Dean told him was a sign of a shapeshifter. He asks if Freddie wants to wait to talk until Ennis' dad gets home, and he agrees. This confirms Ennis' suspicions as the real Costa knows that his father is dead.
Ennis throws his jacket at Costa, and manages to pull his gun, loaded with the silver bullets, on the shifter, who changes revealing himself to be David Lassiter. He explains that he is trying to find out who killed Sal and avert war with the Duvals. He looks at Ennis' jacket and finds flecks of silver in the shreds, ruling out a werewolf being the clawed killer.
That night Ennis scopes out the Duval mansion. Sam and Dean are also there, and Ennis overhears them discussing that Julian Duval paid the coroner to look at Sal's body. They speculate that he wouldn't have done that if he himself was the killer. Violet Duval leaves the house, and David appears, telling her he wants to arrange a meeting between Julian and Margo to broker a peace agreement. Violet argues that Julian doesn't want peace. David brings up an old issue - years ago they were going to run away together, but Violet didn't turn up to the rendezvous.
Just then, the clawed killer appears and knocks David down before abducting Violet. Her screams bring Ennis and Sam and Dean running but the killer and Violet have gone. The Winchesters, Ennis and David leave as the Duval bodyguards swarm the grounds.
David explains to the Winchesters and Ennis that five monster families rule Chicago. He suggests they track Violet using the GPS in her phone, but he will only give them her number if he can come along. Sam and Dean agree, to Ennis' shock, but Dean explains that sometimes you need to make alliances with the bad guys - to catch the guys who are worse.
In an abandoned building, Violet is bound, her captor - a human called Irv -explains that Sal and a group of monsters killed his young son. He is trying to make the different families go to war against each other in revenge. Meanwhile, Sam, Ennis, Dean and David, have tracked Violet's cell phone signal to the building. As they search it, Ennis tells David what Sal said as he died.
Irv manages to capture David. He starts to torture him with his silver claws, and Violet becomes enraged, transforming into a werewolf and attacking Irv. David manages to pull her off just as the Winchesters and Ennis arrive. Irv makes a half-hearted apology for killing Tamara, saying she was in the way, but Ennis kills him.
The next day David visits Violet, and muses over his brothers final words. Violet remembers - without telling David - that the night they were meant to leave together, Sal intervened and told her not to go because the families must keep the bloodlines pure. In the present day, as she is about to leave she turns and kisses David.
At the Lassiter home, his ailing father warns David not to let Margo start a war. David goes and tells Margo he has found out that Sal's killer was not Julian Duval, and that he is now returning home - to the family business.
Sam and Dean Winchester reluctantly leave Ennis after getting a call from Castiel that he has found Metatron. They warn Ennis to stay away from the monsters, and advise that they will send some hunters to clean things up.
However Ennis returns to Irv's lair, and is examining all the information Irv collected on the monster families. His phone rings and a voice tells him not to get involved. It is the voice of the father he thought was dead.
Cast and CharactersEdit
- Danielle Savre as Margo Lassiter
- Nathaniel Buzolic as David Lassiter
- Lucien Laviscount as Ennis Ross
- Sean Faris as Julian Duval
- Erinn Westbrook as Tamara
- Bryce Johnson as Sal Lassiter
- Melissa Roxburgh as Violet Duval
Featured Supernatural BeingsEdit
"Somehow" by Caught a Ghost
"Looking Glass / Pettibon" by ERAAS
"Little Black Submarines" by The Black Keys
- This episode has the lowest user ratings on IMDb of the entire series. 
- Out of 2,878 votes, it received a 6.0 rating.
- This episode served as a backdoor pilot for the [now cancelled] Supernatural spin-off Supernatural: Bloodlines.
- This is the episode where the most supernatural beings are featured together during the entire series run: a total of 8.
- The Impala in this episode belonged to a fan.
- Chicago, Illinois was previously the setting for the season 1 episode "Shadow".
- The theme of Supernatural: Bloodlines is very similar to New Orleans in The Originals, where communities, both Supernatural and otherwise are struggling for dominion in a heavily populated city.
- Dean: "From what you've told us this things sounds new...or Freddy Krueger."
- Freddy Krueger is the main character from a film series called A Nightmare on Elm Street. He is a disfigured serial killer who uses a glove armed with razors to kill his victims in their dreams, causing their deaths in the real world as well.
- Sam tells Ennis that the monster he saw in the mirror was probably a Wraith. The last time we saw one was in Sam, Interrupted.
- David responds to Dean with "Sounds good, Buffy". Buffy is a reference to Buffy the Vampire Slayer, a show of the same genre which features a girl who fights vampires and demons.
- Dean introduces himself and Sam as "Agents Bonham and Peart" referring to John Bonham of Led Zeppelin and Neil Peart of Rush who were/are both drummers.
- Sal Lassiter: You werewolves. You think you're so special, when really you're all just sons of bitches.
- Ennis: But I couldn't walk away, this is my fight now. Hell, it's a damn war, and I gotta start somewhere.
- Dean: Hey Sammy.
Dean: This is full of blood and meat... a lot of meat, actually this one, this one's labeled Susan.
- Dean: All right, Sammy, give him the talk.
Sam: All right, look, my name is Sam Winchester. That's my brother Dean. We..uh... kill vampires. And werewolves, and demons and... Basically, we chase down evil and we cut it's head off.
Ennis: So, you're what, monster cops?
- Ennis: Who are you?
David: My name is David Lassiter. I'm a shapeshifter.
Ennis: You're a what?
David: We shift... our shape. It's kind of all there in the name.
- Sam: So this girl, she's a shifter too?
Dean and Ennis: Awesome.
- Dean: And sometimes you got to work with the bad guys to get to the worse guys.
David: Dude, I'm right here.
Dean: Yeah, I see you.
- Violet: Why are you doing this?
Sal: 'Cause he's my little brother, Violet, it's my job to protect him, it's my job to keep our blood pure.
Violet: You believe that bloodline crap?
Sal: We all do. Bloodlines, everyone knowing our place, it's the one thing we all agree on. If your people find out you ran off with a shifter, they'll be looking for payback, and they'll come after my family. Then it's nothing but bad times and dead bodies on both sides. David wants to go straight that's his call, but he does it alone. So you have a choice Violet: you can either walk out of here alive, or I'll take you out and dump what's left of you in the lake.
- Ennis: You're going.
Sam: Look we'll, uh, we'll call in some other hunters, some pros and download them on the monster mob situation, all of it.
Ennis: Look guys, I could-
Sam: Ennis, seriously, don't. You get into this too deep there's no getting out.
- ↑ http://archive.is/2017.05.16-155810/http://www.imdb.com/title/tt0460681/eprate#selection-33929.0-33929.5