The penultimate episode of the seventh season finds the boys on the hunt for ancient vampire blood, Bobby on the hunt for a body, and Dick Roman on the hunt for the boys as Leviathan's great, big human-fattening operation goes into full-swing.
Some of the best episodes of Supernatural are the ones that remind that viewer that the wider mythology of vampires, demons, and werewolves co-exist for hunters Sam and Dean Winchester, and that all of these creatures share some kind of primal origin. In "There Will Be Blood," we're allowed a greater glimpse into how some of that mythology is interconnected.
Earlier in the season, when corporate magnate/secret monster from Purgatory Dick Roman (James Patrick Stuart) had a meet and greet with current ruler of Hell, Crowley (Mark Sheppard), we learned that to Leviathan, demons were somewhere down low on the great cosmic totem pole of evil. Well, it seems like vampires are to a certain extent, distant cousins to Leviathan (albeit the kind that would totally murder each other in the night the first chance they get). This allows us to get reacquainted with the Alpha Vampire (Rick Worthy), seen last season getting tortured for information about the whereabouts of purgatory by Sam and Dean's grandfather. So of course, the boys want to go and hit him up for some of his precious, ancient blood.
It's one of the components for the mysterious weapon they discovered with the help of an unwilling prophet in last week's episode, which requires the blood of an angel (Castiel provided the supply here), and a supply from three of the original fallen: an alpha creature, a king of hell (Crowley, but he ain't sharing, yet), and pure blood. If there's one flaw with this storyline, it's that as much of a fetch quest as it's going to be for Sam and Dean, it doesn't have the desperation of say, mounting an assault on Lucifer back in season five. Right now, with one episode to go, that tension isn't quite there with the main plot, and Leviathan's To Serve Man plot, while a clever joke (they've laced mind-numbing chemicals into the nation's food supply to make humans more docile prey), it feels more like a wacky one-off that keeps going instead of a viable threat. The fact that it's poisoning the food supply for all of the other monsters out there is a really interesting spin, and I could imagine with more time in the season, Sam and Dean possibly (somehow) marshaling a bunch of ticked-off werewolves, shapeshifters, and ghouls to mount an assault on Leviathan (but it doesn't seem like there's much room for that left).
Where the show really has some heat though is in the ultimate fate of Bobby, whose continued ghost status is starting to give him a case of the poltergeist crazies—he's getting stronger, and worse, he's having trouble keeping his anger in check as he becomes more and more frustrated at the boys' continued inability to take down his killer, Dick Roman. Midway through this episode, Bobby body-jacks and hotel maid and makes off for parts unknown, meaning he's pretty much right there at the precipice of going full dark side.
A few balls in the air at this point for Supernatural with only one episode left for this season. Will Sam and Dean really be able to take out Leviathan in the last hour, will the writers be able to resolve Bobby's storyline? What about the state of the rest of the supernaturals who have been affected by Leviathan's master plot?
Supernatural airs Friday nights at 9 on the CW.