At the clinic, George lays down on a bed as Izzie screeches about the cost. What with the profuse sweating and the trouble breathing, though, he's pretty convincing that he needs it, and so she allows it, and Bailey sends Alex to take his place in surgery. When he runs into the OR, the Chief asks about George, and Alex explains, as if it makes perfect sense, "He's married." The Chief nods knowingly, and they cut into their patient.
Back at the holding tank for ill interns, Izzie is moping about the lack of patients, and Bailey finally tells her to shut up about the money or risk losing her life. Izzie explains her neurosis a little bit more by saying it's about Denny and honoring his memory in a meaningful way. Bailey softens a bit and assures her that it will; as if on cue, a man and his sulky daughter appear before them. Izzie's joy is quickly tempered, though, when it turns out the girl needs a lesson in feminine hygiene products since her mother has died and her dad is at a loss. Bailey delights in giving Izzie the case.
The curtain next to George's bed is pulled back, and it's Olivia, with the same symptoms as George. She continues the conversation she started earlier in the hall, imploring that he should be happy but he's not. Rather than talk about his elopement, he notices her symptoms and those of the lab tech who just lay down as well, noting it was the same person who took Marina's blood. George mutters, "She's toxic," and Olivia agrees, "Callie? Yeah, a lot of us feel that way." Girl! Those who live in houses where they gave the guy syphilis, even unknowingly, can't throw stones! George, however, meant that Marina's blood is toxic, and tries to call the OR. Unfortunately, everyone is too busy being passed out cold on the floor to answer.
Derek is shouting directions for no one to go in the OR, and it looks like they got all of the staff members out. There's panic all around, and Meredith walks in wearing her scrubs and asks how she can help. Derek tries to send her back to her mom, but she persists, so he finally pulls rank on her and orders, "Dr. Grey, talk to your resident." No one can cross Ellis' path and emerge unscathed, it seems. They realize the problem, that Marina was taking herbal supplements that interacted with the radiation to make her blood toxic; they are lucky that the doctors working on her aren't dead, and it's all because of George realizing what was going on. Callie worriedly runs to George, and he can only blurt out that the blood was toxic, not their marriage. Callie pulls up short, and gets her panties into a twist that he thought the marriage was toxic. Callie needs to stop being so aggravating; again, I get that she's on edge, but listen to your HUSBAND for one second! You just laid a trap for him and let him walk into it. For the sake of you guys proving everyone wrong about your quickie marriage, you might want to take a deep breath and listen for a moment. The attendings meet and try to figure out what to do about the poor intubated girl lying open on the operating table.