About Grey's Anatomy Season 14, Episode 18 : Hold Back the River

Amelia, Koracick and DeLuca perform a risky, groundbreaking procedure using ultrasound waves to remove a young patient's brain tumor. Meanwhile, Meredith and Jo work with different polymers to try to salvage their project submission; and Richard's AA sponsor is admitted to Grey Sloan with a DNR. Guest Stars: Jake Borelli, Greg Germann, Jaicy Elliot, Alex Blue Davis, Mary Kay Place, Jeanine Mason, Annie Sertich, Nayah Damasen, Caitlin McGee, Steele Gagnon, Hal Sparks, Nina Millin, Marilyn Tokuda, Jonée B. Shady,