Paul Castello

Paul is a doctor at Dillard Medical Center who treated Derek Shepherd after his car accident.

History
Paul is one of the doctors who tended to Derek Shepherd when he came into the Dillard ER. When Edie wanted to run a head CT, he said they shouldn't because he believed the abdominal injuries were more pressing. When he became unstable in the ER, they rushed Derek into surgery.

While they were on the way to the OR, Edie made one final play to get the CT, since he was stable. Paul again declined and they took Derek into surgery and started operating. When he became unstable, Paul finally remembered that he'd had a head laceration and had the anesthesiologist check his eyes, which revealed a blown right pupil. They paged the neurosurgeon, Dr. Cohn, who said he'd be there in 20 minutes because he was at a dinner. Despite this, it took him an hour and a half to arrive.

After the time had passed and they were able to declare Derek brain dead, Paul approached Meredith about what to do. She explained that she knew the process because she's a surgeon, too, and then screamed at him to give her the papers.

Professional
He works alongside Edie. He seems to have little to no respect for her, which Derek believed was because she's smarter, younger, and probably because she's a woman.

Career
Paul is a doctor at Dillard Medical Center.