In "Can't Fight This Feeling", a gas tanker explodes on a Seattle highway, causing multiple injuries -- including paramedic Matthew; Meredith and Jo help a frantic mother (Sarah Chalke) whose child is suffering from a mysterious illness; and Owen bonds with a young boy whose parents are in critical condition. Meanwhile true colors are revealed when Alex is forced to work with Jo's boyfriend on an ailing patient.
Watch a sneak peek below:
The mysterious illness story is based on Sarah Chalke's own experience in dealing with her son's diagnosis of Kawasaki Disease, an illness that inflames blood vessels in the body and is difficult to diagnose - which is why Chalke was so willing to share her family's story in hopes of helping others affected by the disease who may not know it.
GREY'S ANATOMY stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Sandra Oh as Cristina Yang, Justin Chambers as Alex Karev, Chandra Wilson as Miranda Bailey, James Pickens, Jr. as Richard Webber, Sara Ramirez as Callie Torres, Eric Dane as Mark Sloan, Kevin McKidd as Owen Hunt, Jessica Capshaw as Arizona Robbins, Jesse Williams as Jackson Avery and Sarah Drew as April Kepner.
Guest starring Sarah Chalke as Polly.
"Can't Fight This Feeling" was written by Meg Marinis and directed by Mark Jackson.