APRIL IS FACED WITH A DIFFICULT DECISION, ON ABC'S "GREY'S ANATOMY"

Rita Moreno and Casey Wilson Guest Star

"Odd Man Out" - Richard throws everyone for a loop when he switches the resident and attending pairings, and Arizona takes a huge risk on a woman who is pregnant with quadruplets. Meanwhile, April is faced with a difficult decision, on "Grey's Anatomy," THURSDAY, MARCH 17 (8:00-9:00 p.m. EDT) on the ABC Television Network.

"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, Sara Ramirez as Callie Torres, Kevin McKidd as Owen Hunt, Jessica Capshaw as Arizona Robbins, Jesse Williams as Jackson Avery, Sarah Drew as April Kepner, Caterina Scorsone as Amelia Shepherd, Camilla Luddington as Jo Wilson, Jerrika Hinton as Stephanie Edwards, Kelly McCreary as Maggie Pierce, Jason George as Ben Warren, Martin Henderson as Nathan Riggs and Giacomo Gianniotti as Andrew DeLuca.

Guest starring are Samantha Sloyan as Penny Blake, Scott Elrod ("The Young and the Restless") as Major Will Thorpe, Rita Moreno ("West Side Story," "Singin' in the Rain") as Gayle, Casey Wilson ("Happy Endings," "Gone Girl") as Courtney Hall, Jay Ali as Doug, Lance Henriksen as Griffin McColl and Jamie Rose as Lena.

"Grey's Anatomy" was created and is executive-produced by Shonda Rhimes ("Scandal," "How to Get Away with Murder"). Betsy Beers ("Scandal," "How to Get Away with Murder"), Mark Gordon ("Saving Private Ryan"), Rob Corn ("Chicago Hope"), William Harper, Stacy McKee, Zoanne Clack and Debbie Allen are executive producers. "Grey's Anatomy" is produced by ABC Studios.

"Odd Man Out" was written by Meg Marinis and directed by Kevin McKidd.

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