Nick Munroe is the identity used by a siren who approaches Sam and Dean.
This siren appears to Sam and Dean as an FBI agent also working the same case. Sam and Dean split up and Dean goes with Nick to the strip club. There they get close and Dean realizes that Nick is not so up tight like most feds. Dean is further impressed by how much he has in common with Nick. Nick mentions to Dean that at each crime scene there was a flower found; the same flower located in Dr. Cara's office.
Later on Dean calls Nick to help him out on a stake out. Dean also tell Nick that Cara is drugging her victims as they share a drink. During this time, Dean gets infected with the siren's drug, and Nick reveals himself as the siren. Dean is completely under his control. So they return to the motel room, and Nick reveals the meaning behind his form. Dean didn't really want some chick, but a little brother that looks up to him and trusts him. Nick also drugs Sam and makes the two fight for him.
As Dean prepares to kill Sam with a fire axe, Bobby Singer suddenly appears, stops Dean and stabs him in the shoulder with a bronze knife. Nick tries to flee down the hallway, but Bobby flings the knife into his back. Stumbling, Nick stares at his true reflection in a mirror for a moment before falling, dead, breaking his hold over the Winchesters.
In the aftermath of the fight, Bobby reveals that he had grown suspicious of "Agent Nick Munroe" and checked into him to learn that he wasn't real. Bobby chides Sam and Dean for not taking the same precaution as it only took one phone call to expose Nick as the Siren.
Powers and Abilities
- Shapeshifting - He was able to take on multiple forms to seduce his victims.
- Telepathy - He was able to read the minds of his victims to learn what they desired most.
- Invulnerability- He couldn't be killed by conventional methods, only a bronze dagger coated in the blood of one of his victims was able to kill him.
- Pathokinesis - Through his venom, he was able to manipulate feelings of love and devotion to a limited degree, his victims would become enthralled that they would do anything to prove their love for him.
- Bronze Dagger Coated in the Blood of His Victim - It was able to kill him.
- Mirrors - Like a wraith, his true form was revealed in a mirror.