When I was little, I once asked my mother, "How do you tell people such bad news?" "You tell them the truth," she said, "but you tell them the best version of the truth you can come up with." My mother also never told me I had a little sister, so grain of salt. My mother said, "Tell the truth. Just tell the best version of the truth you can." Because the truth is gonna come out sometime. And the one thing you can't do with the truth is hide from it. Because the truth is gonna come looking until it finds you.

Momma Knows Best is the fourth episode of the fifteenth season and the 321st overall episode of Grey's Anatomy.

Short SummaryEdit

Meredith turns heads when she shows up to work done up and ready for her blind date later that day, while Alex makes a questionable decision in order to save a patient. Meanwhile, the burden of knowing Teddy's secret keeps Maggie up at night, ultimately making her decide she has to tell someone.

Full SummaryEdit


  • Meredith Grey
  • Alex Karev
  • Miranda Bailey
  • Richard Webber
  • Owen Hunt
  • Amelia Shepherd
  • Jo Karev
  • Maggie Pierce
  • Andrew DeLuca
  • Andy Herrera
  • Ben Warren
  • Atticus Lincoln
  • Evelyn Hunt
  • Dean Miller
  • Evan Forrester
  • Carina DeLuca
  • Levi Schmitt
  • Dahlia Qadri
  • Betty Nelson
  • Julius Guerra
  • John
  • Taryn Helm
  • Natalie Forrester
  • Max Forrester

Main CastEdit

Guest StarsEdit


Medical NotesEdit

Natalie ForresterEdit

  • Diagnosis:
    • Pulmonary edema
    • Pleural effusion
    • Ventricular septal rupture
  • Treatment:
    • Temporary LVAD

Natalie, 40, came into the ER after collapsing outside after evacuating her apartment building for a fire. She coded in the ER and they resuscitated, but then she coded again. They took her into surgery. They believed she'd had a recent heart attack, which seriously weakened her heart. In surgery, Maggie placed a temporary LVAD in order to take the pressure off her heart. After surgery, Maggie said there was only a slim chance Natalie would wake up again. She coded again in her room. They were able to bring her back, but they warned her husband that they believed it was time to say goodbye.

Julius GuerraEdit

  • Diagnosis:
    • Smoke inhalation
    • Pulmonary bleb
  • Treatment:
    • Continuous nebulation
    • Surgical extraction

Julius, 18, came into the ER after an apartment fire with smoke inhalation. He insisted that he was fine, but they ran an x-ray, which showed a bleb on his lung. He'd had it since he was a baby, but he declined to have it removed because his insurance didn't cover it and he couldn't afford it. He tried to leave against medical advice, but he had trouble breathing. Alex examined him and secretly cut him to make it look like he had a penetrating wound to his chest. They took him into surgery to remove his bleb. The surgery went well and he was told he'd be okay.

Andy and DeanEdit

  • Diagnosis:
  • Treatment:
    • Post-exposure exam

Andy and Dean got examined after a fire incident. She said they were both fine.


Song Performer Scene
"Empty Vessels" Devotchka
  • Meredith finds Maggie in the kitchen. She's thinking about Owen and Amelia.
  • Amelia and Betty are fighting because Betty was high and is lying. Their fighting wakes Leo
  • Jo is upset because Alex is distracted during sex. She then mentions a new MRI machine she wants.
"High Hope" Patrick Droney
  • Evelyn leaves.
  • Maggie comes to tell Natalie's husband that it's time to say goodbye.
  • She tries to get him to tell Max that his mother is dying.
  • Andrew takes Max to get some food.
  • Meredith and John talk as they walk. He starts talking about single moms, upsetting Meredith.
  • She tells him it was fun and then leaves.
"Hold on to Me" Valerie Broussard
  • Alex tells Julius he'll be okay. Julius knows what happened.
  • Julius says his mom has been saving for the surgery for years.
  • Alex apologizes to Jo.
  • Jo is surprised to see Link, whom she knows and is happy to see.
  • Maggie and Bailey watch the Forresters.
  • Maggie tells Meredith that people deserve warnings about things coming.
  • Maggie confesses to Meredith that Teddy is pregnant.
  • Andrew comes by looking for Max.
  • Max runs away from the hospital.

Notes and TriviaEdit

  • This episode's title originated from the song Momma Knows Best, originally sung by Jessie J.
  • This episode scored 6.72 million viewers.
  • This episode is the first part of a crossover with the Station 19 episode Under the Surface.
  • While some effort has been taken to hide Justin Chambers' tattoos, they are vaguely visible on his arm when Alex grabs his clothes and leaves the loft.


Episode StillsEdit

Behind the ScenesEdit


See AlsoEdit

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