And then the Fringe gang shows up at the metal depository, where Koenig is still aloft. Walter's completely delighted, and says, "'They glanced up and saw Icarus float through the sky, and taking him for a god, they stood still in wonder.'" I do think the floating man would have drawn more of a crowd. Anyway, Broyles points out that Icarus had wings, but they have no idea how this guy is staying up there. "There's no alarm on the upper windows. Apparently they used their... ability to get up there," he says, and Walter giddily calls it a marvelous way to pilfer. Nice job on the effect on the floating man, by the way. A cop reels him in, and Walter points out, somewhat unnecessarily, that the man is dead: "Assuming he is a man."
The trigger-happy security guard explains that he thought he saw him reach for a gun, so he shot him, and then the guy just floated away. They've got a sketch of what the other guy looked like, and the security guard says there's no gold or platinum missing. Olivia figures that they went to a lot of trouble to get in there, so they must have been after something. Arguably, it's less trouble for guys who can float to pull off a job like that, but we don't need to get into that.
Then there's an agent bringing Broyles a key card they found on the dead guy and after the security guard says it's not for the building, Broyles tells the agent to contact the manufacturer so they can find out what it's for. And while an agent comes over to say they discovered what was taken, Peter's over discovering the weighted-down boots that kept them counterbalanced, and Walter's struggling to examine Floaty McWeightlessness. Jesus, how long ago was he shot? I love it when it seems like the investigating officers didn't do a single damn thing until the Fringe folks showed up.
Anyway, a quick look at the guy's leg confirms that he's human after all, but his calf muscles are extremely atrophied. Makes sense in that you don't use muscles when you float: just ask astronauts. But Walter points out that for deterioration like he's got, he would have had to be weightless for some time. Also, points out Peter, the chest and shoulders are all normal.
Olivia strolls over to ask if they know anything about osmium, instead of Googling it on her magic phone like anyone else would have. If she had done that, though, we wouldn't have been treated to Peter showing off how quickly he can rattle off some information about how it's a durable metal used in electrical contacts and fountain pen nibs. Really, fountain pen nibs? Olivia says the warehouse is missing a substantial quantity, so she thinks that's what the thieves were after. Peter says that's weird because osmium isn't particularly valuable, but Walter points out the irony of the crime: osmium is the heaviest element on Earth: "It's like using balloons to steal bowling balls," he says.
Over at Frost Aerodymanics, guest star Alan Ruck is talking to a co-worker about how something would require the cockpit be resistant to radiation at higher altitudes, so maybe they should blend it with a slightly denser compound.
The other guy from the robbery is in the car park as Ruck and his co-worker enter, and he calls for Dr. Krick, and a surprised Ruck asks "Scotty" to give him a minute, and goes over to ask what the hell the guy's doing here. "Koenig is dead. There was a guard. He shot him," he says, and Krick is a little nonplussed to find out that Koenig's body was left behind. "I had to. What do we do?" says the accomplice, and Krick tells him to go home while he figures something out. But there's more: "I've been nauseous. And my head is killing me. I didn't feel like this the last time," he says, and Krick asks if they got what he asked for. Buddy nods and starts to get it, and Krick tells him not here, ordering him to go to the lab and wait for him. Krick then goes back to his co-worker, and I can only imagine the story he told to explain why some guy who looks like he's in heroin withdrawal just accosted him in a parking lot. Buddy gets back into the car, pulling -- with difficulty -- his weighted-boot-wearing legs inside the vehicle.
Over in Walter's lab, Peter's going through Bell's old files, looking for anything related to gravity. I won't gross you out with Walter's speculation as to what a file labeled "floaters" might actually contain, but when Astrid reacts with disgust, Walter says, "Everybody poops, dear," which is true. Doesn't exactly make it a fun topic of conversation, though. There's another file, too: Personal floatation devices. Peter starts reading it: "The balloon is to be swallowed and then inflated with helium via a tube inserted into the subject's..." Thankfully, Peter stops reading, and Walter reflects on the design flaw that prevented a ton of people for volunteering. Can we be done with the zany scientist comic-relief portion of the show now?
Walter's examining Koenig's bloodwork, and finding there's no helium, nothing gaseous at all, no hydrogen or methane. But his white blood cell count is low, meaning a weakened immune system. Walter theorizes that whatever's making him float is also attacking his body's defences. "Whatever it is, I think the effects are wearing off," says Peter, lifting Koenig's arm, which floats gently back down again.
Olivia comes in with the news that they haven't found this guy in the system yet, but they traced the keycard to a warehouse in Allston, so Peter and Olivia are going on a little ride, which gives Walter a thrill and Peter asks him what's up. "Nothing. When your mother and I were courting, we used to take long walks in the park. But I can see for your generation that a drive to a warehouse would be just as enchanting," he says, making everyone giggle. Look, if you're getting stoned and waking up with Yoko Ono, I don't believe you're likely to call anything "courting" but never mind.
Over at a warehouse in, oh, let's say Allston, Dr. Krick shows up and uses his keycard -- we get a nice long look at it so we know it's the same as the one that was found on Koenig. As he strides through the warehouse, the other guy stands up. "What's happening to me?" he wails, and Krick looks and sees that he's bleeding from both eyes. Big deal! Same thing happened to me last time I switched contact-lens manufacturers.
So in the actual lab, Krick's working with some blue liquid and a Bunsen burner, with the floaty guy saying he doesn't understand, that Krick said if he got more of that stuff that it would be permanent. Krick says he's working on it: "You can't defy gravity without consequences. That's the problem," he says, and then tries to make Bleeding Eyes Murphy here feel better by giving him a pep talk about being a pioneer. "Men like you, your participation in this experiment will help him discover a way to eliminate the side effects."
But while Krick draws the blue liquid into a syringe, Bleeding Eyes up and dies. To his credit, Krick at least looks distressed about this. He's not a complete monster!
Back at Harvard, Walter's still struggling to figure out what's making the body float, when suddenly it drops to the ground like a sack of potatoes. He tells Astrid to put the body on a table and notes that it's dropped three feet in the last half-hour. Well, really, it's dropped three feet in the last half-second. Astrid says it's like a dying balloon, which Walter rejects, because balloons don't lose their buoyancy so inconsistently. Something is eluding him, he thinks. Meanwhile, Astrid can't lift Koenig off the ground so Walter goes to help her, only to find that he now weighs a ton. Something occurs to Walter so he tells Astrid to run a test for osmium. She asks him