In the episode, Sarah's character brings her child to the hospital because despite earlier misdiagnoses, she's certain there is something wrong. The plot is close to home for Sarah, whose real life son Charlie came down with the difficult-to-diagnose Kawasaki Disease — a condition that can lead to severe heart problems if not treated quickly.
"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."
Catch the next new episode of Grey’s Anatomy on Thursday, March 28, 2013, at 9 p.m. ET/PT onABC.