S14, E16: Neela is upset after she finds out the aorta surgery on Sheryl Hawkins (recurring guest star Aida Turturro) has caused an infection. While treating a severely beaten Korean teen, Abby discovers an even more serious condition. Kovac (former series star Goran Visnjic) struggles to forgive Abby for her indiscretion. And Dr. Brenner (recurring guest star David Lyons) continues to ruffle feathers in the ER.