...slings the bag into an employee locker somewhere else, which Rufus then secures with a padlock. The five then retreat to an employee break room that bears a suspicious resemblance to the one we endured only a mere two weeks ago, where Bobby and Rufus start working their phones, reaching out to their vast networks in search of any information they can find on demonic earworms. At one point, Zombie Grandpa rises to leave, and he's immediately challenged by Darling Sammy. "Bathroom break," Zombie Grandpa grunts. "So, unless you wanna hold it for me?" Sam does not, and so allows Zombie Grandpa to pass both unmolested and unaccompanied into the outer hall, because that's such a terrific idea when they've got a homicidal demonic earworm lurking in the building's ventilation ducts just waiting for the opportunity to infect one of them. To his credit, Dean soon enough leaps up to tail Zombie Grandpa to the can, dragging Sam along for good measure, but I think we all know he's already too late. They should have made Zombie Grandpa pee in the sink. "ZZZZZZZ -- revolting! -- ZZZZZZ!"

Meanwhile, Bobby and Rufus confirm that not one of their many associates and acquaintances knows anything about homicidal demonic earworms, so Bobby sets to concocting a Plan B, which basically amounts to this: "Let's just go grab the thing!" "And then what?" Rufus eyerolls. "Well," Bobby splutters, "we sit on our thumbs, or we go in, guns blazing!" "Like Omaha?" Rufus darkly inquires. This touches a nerve, and Bobby more or less tells Rufus to go fuck himself, but we don't have time to deal with that right now, because we've got to jump over to...

...another employee locker room, where Sam and Dean have just arrived to confront Zombie Grandpa over the unpleasantness that transpired back at Crowley's asylum, and the tedious bitchery that follows is completely unimportant because what is important is the fact that Zombie Grandpa has of course been infected with the homicidal demonic earworm, which Eagle-Eyed El Deano realizes when he spots a trickle of bitterly black demonic goo oozing from the ancient pain in the ass's ear. Zombie Grandpa makes to aerate Our Intrepid Heroes with a couple of bullets from the gun he's had hidden in his jacket this entire time, but Dean manages to deflect the shots by slamming Zombie Grandpa's hand against a locker. Unfortunately, this effort seems to throw him off-balance, and Dean tumbles back into Sam's arms as infected Zombie Grandpa scampers off into the hall. D'OH!