Credit: Video Still

One of the major plotlines on Grey’s Anatomy Season 9, Episode 19: “Can’t Fight This Feeling” features guest star Sarah Chalke as a distressed mother struggling to make the doctors believe that there is something really wrong with her son. In this sneak peek of the episode from TV Guide, she gains an important ally in her fight.

The clip begins with Sarah's character struggling to to get anyone to pay attention to her. Jo has apparently already given Sarah's son medicine for strep throat, and it's not helping.

"Either you don't care about my son, or you don't believe me," Sarah's character declares when Jo tells her to calm down. "Either way, you suck! I want someone else. Find me another doctor!"

Unfortunately, the next doc she gets is even more dismissive than Jo had been. But just when things are looking hopeless, Meredith overhears the mother's distress and jumps in to save the day.

"I believe you," she tells Sarah's character. Before the other doctors can disagree, she adds, "I own the hospital and I can do whatever I want. Admit him."

Go Mer! Check out the sneak peek below.

Credit: TV Guide Photo: Grey's Anatomy Season 9, Episode 19 Sneak Peek: "You Have to Believe Me!" (VIDEO)

Catch the episode of Grey’s Anatomy on Thursday, March 28, 2013, at 9 p.m. ET/PT on ABC.

Source: TV Guide

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.