Alexis Stier

Director Vance welcomes NCIS Special Agent Jacqueline Jack Sloane to headquarters; the team investigates the kidnapping of a sailor.

Sean experiences a moral and ethical dilemma when asked to perform surgery on a prison inmate; Kimber questions how far she will go to keep Christian when they receive life-changing news.

Cristina looks to Meredith for advice as she assesses her future at the hospital. Derek and Amelia work together on a difficult surgery involving conjoined twins. Meanwhile, Jo is spread too thin when she tries to work on several cases at once and Stephanie realizes the truth about Bailey's bubble boy case.