Outside, Jo and Stephanie made up and started discussing boy drama when they found a baby in a box by the dumpsters. They took Baby Doe, as I like to call him, straight to Arizona. It was obvious he'd had heart surgery before, but he'd need more. Then, just as Arizona was walking away, Stephanie accidentally rammed her with a gurney, causing Arizona to do a cartwheel that sent me into a laughing fit. Stephanie broke Arizona's (fake) leg. Luckily, there was another one in the car. Yes, Grey's! Way to have fun with the fake leg! I'm so happy we can all -- Arizona included -- laugh about these situations now. This really is the sunshine after the storm.
In other good news, Derek was back in the hospital. Now, he wasn't leaning on the walkway the way that I like for him to, but simply having his McDreamy presence (and hair) back in the hallways made a big difference. The bad news was that his new government project was going to ruin his trial with Callie. In order to use the sensors he and Callie had created for his new project, he had to discontinue all other work with them. Needless to say, Callie was not very happy about that one. (Next step: Make them friends again. I miss them.)
Also returning this episode, as I'd mentioned, was the elevator! Stephanie and Jackson had an awkward run-in where he tried to apologize, and she stopped him. This scene wasn't quite what I was hoping for -- I would've liked it to have been just Jackson and Stephanie and a little bit longer, but I'll take it. You know what else I'll take? More of this Meredith-Alex stuff. The two of them make me smile, as do Mer and Cristina, who found out that Owen had broken things off with Emma. "I can't tell if you're happy or sad," Mer said. "Neither can I," Cristina replied.
Continuing to focus on Arizona, there was another young patient in this episode who actually wanted to have both of her legs cut off. After living her entire life with a condition that caused her legs to hurt 24 hours a day, she was asking her father to cut them off so that she could get fake legs and actually learn to walk and run. Callie wasn't on board at first, but after Arizona confronted her about her fear of amputation -- which Arizona was afraid she had caused -- Callie finally gave in and realized it was the best thing for her patient. Honestly, I'm loving this Arizona.
NEXT: "I'll tell you if you tell me."