Casey Parker

Casey Parker is a surgical intern at Grey Sloan Memorial Hospital.

Interview
Casey came into Grey Sloan Memorial Hospital for an interview to be considered for an internship. He explained that he'd served two tours of duty in cybersecurity the Air Force and after seeing the surgeons work while he was injured, he decided to quit the military to go into medicine. ("Ain't That a Kick in the Head")

New Intern Mixer
Casey attended the new intern mixer at the hospital, where Richard gave a speech about them starting their work as doctors. During the party, Meredith Grey was celebrated as she learned she had been nominated for a Harper Avery Award. The new interns then walked around the hospital, in awe that they worked there and so did Meredith Grey. ("Come on Down to My Boat, Baby")

Roller Coaster Derailment
While the hospital was dealing with the injuries caused by a roller coaster derailing at a fair, Casey tended to patients in the clinic. He came to get Amelia for a consult on a patient with a head injury. ("Who Lives, Who Dies, Who Tells Your Story")

Hospital Hacking
When the hospital was hacked, Casey had the idea to use a defibrillator to override the circuit in the blood bank keypad, restoring access to blood. When Bailey learned about this, she asked what else Casey could do to help, remembering his background in cybersecurity. Casey then revealed that he had a criminal history of hacking and as a condition of that, he wasn't allowed to manipulate computer systems anymore, or allow or enable anyone else to. She pushed him and he gave her written directions to tell the FBI to gain access. When she learned that the FBI was more interested in finding the hacker than saving the hospital, she called Casey to her office, giving him access to her laptop and login and promising no one would ever know. He was able to gain access to the hospital's systems and restore normal function. He then confessed to Bailey that he had been arrested for hacking the DMV to change his sex on his license from female to male because the place where he lived wouldn't allow him to do that otherwise. ("1-800-799-7233")

Helping Owen
Casey worked with Owen developing his proposal for his entry into the surgical contest. When Casey learned that acquiring the patent for a needed polymer was prohibitively expensive, Owen decided he didn't need the contest and didn't enter. ("Harder, Better, Faster, Stronger")

Kimmie Park
When Kimmie Park struggled to eat and keep food down during chemotherapy, Casey supported the idea of her using medical marijuana to help her nausea, which worked. ("Games People Play")

Trauma Certification
The time came for the interns to go through their Trauma Certification Drill. Owen set the scenario where a Cessna crashed into a Greyhound bus. April interrupted and said that the evacuation helicopter wasn't coming and people were dying. Their job was to save lives. Owen judged the competition, but April hung around to help and insistently made the scenarios worse. She even had a second plane crash hit Andrew, who was helping monitor. She also added rain with a hose. The difficulties ended when April was paged away. Owen helped the interns calm down and continued the drill. When April returned, she learned that Casey had been the one to page her away. He realized that she was endangering the patients the most, so he removed her from the equation. She told him he was trying to cheat and after she "cheated" at her certification, a man came into the hospital and died because she couldn't save him. She then started crying and performing CPR on a dummy while the interns watched. Andrew stopped her and she said the certification was done. ("Caught Somewhere in Time")

Contest
After several of the doctors ingested weed cookies, Meredith told the interns they'd have to step up more and told them to keep track of what they did and whoever did the most would win a contest and get to scrub in with her on a Whipple. ("Judgment Day")

Saving April
After April was in a car accident and came to the hospital hypothermic, Casey and the other interns took shifts with the attendings doing CPR. ("Cold as Ice")

Alex and Jo's Wedding
On the day of Alex and Jo's wedding, Casey was part of the group that went to the wrong wedding. When they realized what had happened, they all rushed to get on a ferry out to Bainbridge Island. Despite a series of delays, Jo and Alex eventually got married on the ferry, witnessed by their friends. ("All of Me")

Teddy Altman
When Teddy had a sudden pain in her leg, she found Casey at the desk and asked him the name of the head of cardio. He told her and got her into a room before getting Maggie to come see her. He also checked on Cece Colvin for her so she could treat Teddy. ("With a Wonder and a Wild Desire")

Cece Colvin
He worked on the case of Cece Colvin, a matchmaker awaiting a heart and kidney transplant. He had to show her pictures of his girlfriend to get her to stop trying to match him up. ("Everyday Angel")

Liver Transplant
Casey worked on Ned Billings with Webber. He was also there when Ned coded and Richard was unable to resuscitate. When Bailey stepped in to try to reperfuse Ned's liver to preserve it for Roberta Gibbs, he initially asked if he should go get someone. Jo said to get Alex, but Bailey said to get a reperfusion machine instead so they could save the liver. ("Flowers Grow Out of My Grave")

Natasha Deon
Casey worked on Natasha Deon, who had fallen from a hotel balcony and broken her pelvis. ("Help, I'm Alive")

Catherine's Surgery
When Catherine had surgery to remove her tumor, Casey was in the crowd watching from the gallery until Richard closed the gallery. ("The Winner Takes It All")

Romantic
He has a girlfriend, but nothing is known about her. ("Everyday Angel")

Career
He was a member of the Air Force, but quit to go into medicine. He is now a surgical intern at Grey Sloan Memorial Hospital.

Notes and Trivia

 * As a kid, he watched a lot of MASH and had a thing for Hawkeye Pierce.
 * Casey is the first transgender doctor to appear on the show.