Credit: Video Still

Sometimes, even often, the medical cases take a backseat to the doctors' drama on Grey's Anatomy. However, based on this preview, it looks like Season 9, Episode 19: "Can't Fight This Feeling" is going to put the medicine front and center.

This episode guest stars Sarah Chalke as a mother whose child is suffering from a difficult-to-diagnose disease — and the whole thing is based on Sarah's own experiences. Based on the promo for the episode that you can watch below, it looks like this episode is going to a high-stakes and high-emotion.

Here's a full synopsis of the episode:

"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."

Credit: YouTube Photo: Grey's Anatomy Season 9, Episode 19 Preview: A Mother's Distress (VIDEO)

For more Grey’s spoilers, click here.

Catch the next new episode of Grey’s Anatomy on Thursday, March 21, 2013, at 9 p.m. ET/PT on ABC.

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