Johnny goes back to see J.J. again. The hospital hallways are much busier now that more and more sick kids are being brought in. J.J. is in a plastic tent, and a nurse is drawing blood from his arm. Walt and Sarah stand nearby, waiting. The nurse's beeper goes off and she rushes away, leaving the blood sample behind. Johnny tells Walt and Sarah to go get something to eat while he watches J.J. Walt points out that Sarah hasn't eaten since breakfast, and Sarah reluctantly agrees to go. Once Walt and Sarah are gone, Johnny unzips J.J.'s tent and leans down to whisper, "I love you." Johnny looks around and sees that he's still alone in the room, so he takes J.J.'s hand. Johnny goes into a vision of Sarah and Walt crying next to J.J.'s dead body. Johnny snaps out of it, freaked out. He spots the vial of J.J.'s blood. Johnny picks up the vial and a syringe, and injects himself with J.J.'s blood while repeating, "It's my son!" That would be really shocking if they hadn't totally ruined it in the promos. I waited for that scene all episode and it shows up now, at the very end of the third act? Boo.
Walt and Sarah walk in and ask Johnny what he's doing. Pratt rolls up and asks what's doing. Walt shows Pratt the empty vial. Sarah and Walt are astounded. Johnny says he knows it seems crazy, but one of the clearest visions he had came after a blood transfusion. Pratt asks what happens now, and Johnny says that they have to wait until the infected blood reaches his dead zone.