...the second of tonight's recognizably reused locations, this the trestle bridge from the end of the first season. Again, don't know if it's intentional, but there you go. In any event, Sam tends to his many, many wounds while Dean, in a callback to his Teen Self, vows to rip the ghost's lungs out. And as they puzzle through recent events, Dean goes back to the files he swiped from the principal's office, and discovers something he'd somehow overlooked earlier: "Martha Dumptruck," "Revenge Of The Nerds," and now "Hello Kitty" all rode the same bus to school. DUN! They quickly realize the bus itself must be haunted, so we're off to...

...the bus garage, where Darling Sammy's trusty EMF reader's finally emitting those satisfying VWEEE-YORP!s he'd been looking for earlier. Of course, because it's a school bus, there's no corpse waiting to be desecrated, so Dean flips through the glove compartment in search of further clues, and he finds one: The very recent license for the driver, Dirk McGregor, who took over the route just before the spectral possessions began. And in another cleansing burst of synchronicity, Darling Sammy just happened to know the guy's son eleven years ago. "You know everybody at this school?" Dean snorts, disbelieving, and Dean, honey, I am right there with you.