no edit summary
A young man and woman enter an apartment while kissing. The young woman, [[Ellie]], engages in a stream of nervous chatter before excusing herself. From the bathroom, she hears her front door bust open. She peeks out and sees two men advance towards her date. He bursts into flames. The intruders chase her, but she escapes and climbs down the fire escape, cutting her foot. The older man stops the younger, his son, from shooting her. The father wipes up her blood, saying they have what they need to track her.
In a diner, the Winchesters talk to [[Aaron Bass]] on speaker. In Berlin, Germany, Aaron’s been using his grandfather’s ledger to track and kill the Thule with his [[Golem]]. Aaron says the Thule have a mission called "Das Blut," translated as "The Blood." Unfortunately, he has no information on the watch. Sam gets notified of the death at Ellie’s apartment, so they go to the scene. As Ellie waits in the police cruiser, the son, [[Christoph Nauhaus]], opens her door and handcuffs her. He takes off with Ellie as Sam and Dean exit the building. They see Ellie and follow. Christoph drives to a parking garage to switch vehicles, but he can’t find the keys. He calls his father, and the two argue. Distracted, Christoph doesn’t notice Dean has a gun on him. Sam rescues Ellie.
In an abandoned office in the garage, the Winchesters tie Christoph to a chair and attempt to explain the situation to Ellie. Christoph refuses to answer questions and taunts Dean to kill him. Dean motions for Sam to cover Ellie as he prepares to shoot Christoph. Sam shields Ellie as Dean takes aim. Christoph immediately agrees to talk. According to Christoph, the pocket watch dates back to World War II. It belongs to his father, [[Commandant Nauhaus]], a Thule High Command. At the end of the war, when Hitler was preparing to shoot himself, Nauhaus stopped him, telling him of "another way". Nauhaus preserved [[Hitler]]’s [[soul]] inside the [[Nazi Pocket Watch|watch]], which has been missing since the end of the war. With its rediscovery, the Thule plan to resurrect Hitler. Christoph says the soul of Hitler can only possess a direct descendant. Christoph nods to Ellie as one such descendant. Ellie insists her mother traced their genealogy to the Mayflower, but Christoph tells her she’s adopted. He explains they’ve been watching her. To prove it, he recites details about her life. As the details get more specific, she storms off.
At the diner, the brothers are discussing Ellie when Christoph sits next to Sam. Dean trains a gun on him. Christoph offers to help find Ellie in exchange for protection. To prove his trustworthiness, Christoph tells them a Thule is watching, and that he killed one after his father ordered his execution. The Winchesters let Christoph lead them to Ellie.
Outside the hangar, Nauhaus stands over Fritz’s body, expressing admiration that his son displayed such courage. The Thule wheel Ellie towards medical equipment. The Impala parks near the hangar and Sam handcuffs Christoph to the Impala. The brothers load up from the Impala’s arsenal, and Dean grabs the [[Grenade Launcher]]. Sam nixes the idea, to his brother's intense disappointment. Inside the hangar, the ritual begins; a tube leads from Ellie to a medical device, and then to Nauhaus, the recipient of her blood. Outside, Sam and Dean take down the guards and enter. The Thule place the watch on Nauhuas’s torso. It creates a swastika-shaped incision and sinks into his chest. The incision cauterizes instantly, leaving a swastika-shaped scar. Nauhaus springs to life with maniacal laughter. Hitler, in Nauhaus’s body, exuberantly jumps up and down. He recognizes Hans, Wolfgang, and Gottfried, greeting them enthusiastically. Hitler notices Ellie, calling her his great great grand-niece. He thanks her, but he tells his men to drain her blood and feed her to the dogs. Sam and Dean enter the building, are captured, and delivered to Hitler. Dean calls Nauhaus father of the year, and Gottfried demands he address the Fuhrer with respect. The Winchesters realize Hitler is possessing Nauhaus.
While Hitler taunts the Winchesters, Ellie woozily watches the guards place the Winchester’s guns on the medical equipment. She moves towards the guns while the Thule are distracted by Hitler screaming for his plane and ordering the Winchesters fed to his dogs. Ellie shoots and kills a Thule. Dean takes a gun from the dead Nazi and kills the others. Dean advances on Hitler, punches him to the ground, and delivers a head shot along with a "Heil this." Sam marvels that Dean killed Hitler. As Sam, Dean, and Ellie walk to the Impala, Dean repeatedly boasts that he killed Hitler. They free Christoph, and Sam reminds him that the Thule will hunt him for the rest of his life. Christoph walks away.
"The One You've Been Waiting For" is the [https://www.youtube.com/watch?v=YNCArPzIbBQ title of a song] by Nick Cave, released in 1997. It can also be seen as a sardonic comment over the fact that this is the episode where [[Hitler]] appears. It also references the [[Grenade Launcher]], the largest and (presumably) most destructive weapon in the Impala's arsenal. Despite being very noticeable to the audience due to its size and bulk, it was never used, interacted or mentioned in any way before. It has been part of the arsenal since the first episode, implying that the audience - and Dean - wanted to see it in action for a long time.
:''Possibly recalling the scene where Trinity says "Dodge this" as she points her gun at one of the Agents in [https://en.wikipedia.org/wiki/The_Matrix The Matrix.]''