ARIZONA MUST GO INTO SURGERY KNOWING THAT A $25 MILLION DONATION TO THE HOSPITAL AND A 10-YEAR-OLD BOY'S LIFE ARE ALL ON THE LINE, ON ABC'S "GREY'S ANATOMY"

"Invest in Love" � A generous donation is offered to Seattle Grace by the parents of Arizona's 10-year-old patient. however, when his condition worsens, she finds herself in a conflict of interests. Meanwhile, Cristina tests her boundaries with Owen at the hospital, and adding insult to injury, Alex is left with all of Izzie's hospital bills to contend with, on "Grey's Anatomy," THURSDAY, NOVEMBER 5 (9:00-10:01 p.m., ET) on the ABC Television Network

"Grey's Anatomy" stars Ellen Pompeo as Meredith Grey, Patrick Dempsey as Derek Shepherd, Sandra Oh as Cristina Yang, Katherine Heigl as Isobel "Izzie" Stevens, 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, Chyler Leigh as Lexie Grey, Kevin McKidd as Owen Hunt and Jessica Capshaw as Arizona Robbins.

Guest cast include Nora Zehetner as Dr. Reed Adamson, Jesse Williams as Dr. Jackson Avery, Robert Baker as Dr. Charles Percy, Mitch Pileggi as Larry Jennings, Alanna Masterson as Hillary and Khamani Griffin as Wallace.

"Invest in Love" was written by Stacy McKee and directed by Jessica Yu.

"Grey's Anatomy" is broadcast in 720 Progressive (720P), ABC's selected HDTV format, with 5.1-channel surround sound and Spanish subtitles via secondary closed captioning. A TV parental guideline will be posted closer to airdate.

For more information on "Grey's Anatomy," visit ABC.com.