Jackson finds Meredith and rushes her to the locker room, where it seems that Cristina has once again unraveled. Cristina, head in her hands, cries that she wants Owen, and Meredith sends Jackson to find him. Once he's gone, though, Cristina jumps up triumphantly and begins to eat an apple with as much sass as she's ever had, pointing out that Owen's at the dentist, which is going to make him hard to find. Meredith is genuinely appalled but at the same time can't help but break into a grin to find Cristina doing so well that she's back to her underhanded tricks.
Either because she was moved by Callie's tears or because she desperately wanted her exam room freed up, Lucy wheels in the mother of all machines with the highest resolution possible. She warns that even with this it's still hard to find the heartbeat, and pointedly adds that she doesn't have most mothers come in until after the eighth week because when they don't hear a heartbeat, they freak out. Callie has calmed down enough that she totally picks up on the emphasis there and looks the tiniest bit sheepish. But since she's there, Lucy says it can't hurt to have one more look.
Richard, Lexie and the others are just hanging out in the OR, waiting for Bailey, which gives the perfect opportunity to expose Richard further to the world of Twitter. Lexie asks a question that someone sent but then puts on her Bambi eyes and says that they aren't tweeting, so she'll ignore it. Of course Richard goes ahead and gives her the answer, and then another. Then a former resident sends a hello message, and Richard is totally charmed to hear it. He seems to be coming around that there might be something to this tweeter nonsense after all.
Soulful surgery montage! Alex and Derek prep Daniel for surgery while Teddy and Cristina work away on Martha. Jackson finally runs in, late and ticked off after his fruitless search for Owen, and he realizes he was played. Richard is now totally caught up in the fun of answering questions over Twitter and is giving Lexie information faster than she can even type. Bailey then runs in with a cooler containing the cells they need, and they all get back to work while Lexie keeps the world updated on their progress.
Up in Callie's room, just as she's sure that they aren't going to see anything because it's too early, Lucy picks up on something and they hear the gurgly thump of a heartbeat. Everyone grins and Callie's eyes fill with tears, but happy ones this time.