ALEX HAS A BONE TO PICK WITH DELUCA AND MEREDITH TRIES TO STAY OUT OF IT ON AN ALL-NEW EPISODE OF ABC'S 'GREY'S ANATOMY,' THURSDAY, MARCH 21

"Add It Up" - Maggie introduces mood rooms as an alternative approach to medicine. Alex and DeLuca butt heads over an 11-year-old patient who tries to sabotage her own surgery. Jackson and Richard deal with a gender non-binary patient. Meanwhile, Teddy has a pregnancy scare that brings Owen and Koracick to odds on "Grey's Anatomy," THURSDAY, MARCH 21 (8:00-9:01 p.m. EDT), on The ABC Television Network, streaming and on demand.

"Grey's Anatomy" stars Ellen Pompeo as Meredith Grey, Justin Chambers as Alex Karev, Chandra Wilson as Miranda Bailey, James Pickens Jr. as Richard Webber, Kevin McKidd as Owen Hunt, Jesse Williams as Jackson Avery, Caterina Scorsone as Amelia Shepherd, Camilla Luddington as Jo Wilson, Kelly McCreary as Maggie Pierce, Kim Raver as Teddy Altman and Giacomo Gianniotti as Andrew DeLuca.

Guest starring is Stefania Spampinato as Carina DeLuca, Alex Blue Davis as Casey Parker, Sophia Ali as Dahlia Qadri, Jake Borelli as Levi Schmitt, Chris Carmack as Atticus "Link" Lincoln, Jaicy Elliot as Taryn Helm and Greg Germann as Tom Koracick.

"Add It Up" was written by Alex Manugian and directed by Michael Watkins.

"Grey's Anatomy" was created and is executive produced by Shonda Rhimes. Betsy Beers, Mark Gordon ("Saving Private Ryan"), Krista Vernoff ("Shameless"), Debbie Allen, Zoanne Clack, Fred Einesman, Andy Reaser and Meg Marinis are executive producers. "Grey's Anatomy" is produced by ABC Studios.

"Grey's Anatomy" is broadcasted in 720 Progressive (720P), ABC's selected HDTV format, with 5.1-channel surround sound. A TV parental guideline will be assigned to this program at a later date.