It looks like saving Owen's life and offering herself up to the shooter to save Cristina earned Mere the right to be there for the rest of Derek's surgery, and she strokes his luscious hair while Cristina finishes up. Owen is also there, his arm bandaged up, observing in case she needs help. Of course things have to get scary once more for good measure, and his heart starts beating wildly.
Mark and Lexie arrive at Seattle Presbyterian, and Mark holds Lexie's hand and leads her in to see Alex. Teddy greets them in some jarring red scrubs, and the second Lexie sees Alex she drops Mark's hand and runs in to go see him even though he's still asleep after surgery. She sighs and takes his hand, much to Mark's chagrin.
Back at Seattle Grace, Cristina pulls out the paddles and uses them on Derek's heart.
Outside, Mandy reunites with Cute Ryan Devlin while Callie and Arizona get Ruby into an ambulance and then stare at each other a moment before Arizona turns to go help kids find their parents. Callie calls after her and says that people died, which at first sounds really accusing, like she can't believe Arizona would... help frightened, lost children? I know, it makes no sense, but there was some definite accusation there even if she didn't mean it, and I don't think she did because the next thing she says is that she doesn't want kids if it means she can't be with Arizona. Arizona turns and tells her that no, they'll have all kinds of kids, and that Callie will be an amazing mom, and she can't live without her, and blah blah blah making out. Aw. It's textbook, but it still warms my heart.
Derek's surgery seems to be going badly, what with all the blaring alarms, but after a moment his heart settles back in to a normal rhythm, and everyone heaves sighs of relief.
"Live or die. Hero or coward. Fight or get hit." We see a cop photographing Derek's blood on the walkway and then see a very much alive Richard walking up to Officer Chase, who has forgiven all and shakes Richard's hand. Derek: "I'll say it again to make sure you hear me." It's impressive that he's superior and bossy even in voiceover. "The human life is made up of choices.
"Live or die. That's the important choice." Mere is at her locker and stares at her positive pregnancy test from that morning until Cristina comes in to tell her that Derek is asking for her. So he's going to survive, but I'll bet that this is probably going to put Richard back in charge of his hospital again, at least for a little while. Mere sighs, confused, and thinks a moment before tossing the test in the trash and walking out to go visit him. Derek wraps up: "And it's not always in our hands."