There's an invisible line in the OR. You scrub, you gown, you glove, and you approach the sterile field. It's an important boundary. It's there to protect the patient and you. Without that line, about a million things can go wrong. Funny that something so important is completely invisible. There's a reason so many babies' first word is "no." It's because it's the word they hear the most. From the second we're born, we want to cross the line, push the boundaries, test the limits. But then we grow up and learn that not all rules are bad. Some boundaries protect us. Some lines keep us safe. The nice thing about being an adult is we can choose for ourselves. We can screw the rules or we can make our own.

I Walk the Line is the fourteenth episode of the fifteenth season and the 330th overall episode of Grey's Anatomy.

Short SummaryEdit

A sea of patients flood the hospital after gunfire goes off at a parade. A blast from the past throws Maggie off her game on the same day that Meredith tries to talk to her about dating DeLuca. Meanwhile, Owen and Amelia get some potentially life-altering news about Betty.

Full SummaryEdit


  • Meredith Grey
  • Alex Karev
  • Miranda Bailey
  • Richard Webber
  • Owen Hunt
  • Jackson Avery
  • Amelia Shepherd
  • Jo Karev
  • Maggie Pierce
  • Andrew DeLuca
  • Teddy Altman
  • Julian
  • Thomas Koracick
  • Lucille Reid
  • Seamus Anderson
  • John Dickinson
  • Marvin
  • Levi Schmitt
  • Kimberly Thompson
  • Taryn Helm
  • Dahlia Qadri
  • Casey Parker
  • Carol Dickinson
  • Pete
  • Colin Anderson
  • Paramedic Kevin Clarke

Main CastEdit

Guest StarsEdit


Medical NotesEdit

Kimberly ThompsonEdit

  • Diagnosis:
    • Bicuspid aortic valve
    • Thoracic aortic aneurysm
  • Treatment:
    • Aortic grafting

Kimberly, 43, came to the hospital. She had a bicuspid aortic valve and thoracic aortic aneurysm. She had had a repair with the Elephant Trunk technique five years prior, but the graft had given out, so she needed an aortic graft replacement, which was much more difficult than the first time. Meredith suggested putting the stent in from below. Maggie said they could possibly send the graft up through the groin, but she'd need someone else to do it because she'd need to be at the heart to connect it. Meredith offered to scrub in to help. Maggie opened her chest and put her on bypass, then the graft was threaded up and placed. She survived her surgery.

Colin AndersonEdit

  • Diagnosis:
    • Gunshot wound
    • Broken metacarpals
  • Treatment:
    • Chest tube
    • Surgical repair
    • Lobectomy

Colin, 15, had been shot while walking in a parade. The bullet went through his hand into his chest. They put in a chest tube, which pulled out a lot of blood. His fingers were broken, but there was good blood flow to his hand. The bullet was lodged in his chest. They took him into surgery, where they started repairing his chest. Jackson did an ultrasound of his hand which showed that there was no nerve function, so he stepped in immediately to start work on it. After his surgery was complete, his father was told he'd be okay. They had had to remove a portion of one lung, but he'd compensate after some rehab. They also put pins in his hand to repair the fractures.

Lucille ReidEdit

  • Diagnosis:
    • Head lac
    • Stenosis
    • Aneurysm
  • Treatment:
    • Surgery

Lucille, 71, had fallen at home and was in for a syncopal work-up. It was clear, so she was about to be sent home when her boyfriend mentioned dizziness. Teddy ordered a CT angio and a neuro consult. They found stenosis and an aneurysm. They scheduled surgery to have Teddy fix the stenosis while Tom repaired the aneurysm. She was awake and stable afterward.

Mr. DysonEdit

  • Diagnosis:
  • Treatment:
    • Surgery

Mr. Dyson had just had surgery. Dahlia gave report to Meredith about what they'd do for post-op monitoring.


Song Performer Scene
"Never Gonna Catch Me" Las Palmas
  • Andrew buys Meredith coffee. He proposes a date, but she wants to talk to Maggie first.
  • Teddy and Tom talk about the hotel food. Owen interrupts the conversation.
"Life on Earth" Snow Patrol
  • Maggie, Meredith, and Jo operate on Kiki.
  • Things go south in Owen, Alex, and Jackson's OR.
  • Teddy works on Lucille in the cath lab.
  • All patients' loved ones sit in the waiting room.
"Superposition" Young The Giant
  • Bailey tells Alex she's proud of him.
  • Teddy visits Koracick's room. She tells him they are something else than friends.
  • Meredith decides she's taking Andrew out.

Notes and TriviaEdit

Grey's Anatomy 15x13 Promo "I Walk the Line" (HD) Season 15 Episode 13 Promo

Grey's Anatomy 15x13 Promo "I Walk the Line" (HD) Season 15 Episode 13 Promo

  • This episode's title originated from the song I Walk the Line, originally sung by Johnny Cash.
  • This episode scored 6.58 million viewers.
  • As of this episode, all actors portraying the recurring interns are credited as guest stars. Up until this episode, Jaicy Elliot and Alex Blue Davis were credited as co-stars.
  • Writer Jason Ganzel appears at the barista who serves Meredith and Andrew's coffees in the beginning of the episode.
  • Editor Chad Mochrie appears as a member of the Scottish pipe band.


Episode StillsEdit

Behind the ScenesEdit


See AlsoEdit

A complete overview of this episode's crew can be found here.