Meredith's dishonesty is revealed, leading to unexpected consequences for her and others; Cristina is forced to choose between her relationship and her career; the new chief resident is chosen.
Blake must work with her retired police captain father and her detective brother to solve a series of murders in Kansas City.
Randall and Beth adjust to a new family dynamic. Kate books her first big gig. Kevin suffers a setback on his movie. Jack and Rebecca are visited by an unwelcome guest.
Kate and Toby's lives take an unexpected turn. Meanwhile, Rebecca encourages Kate's singing aspirations.
After the mysterious death of an astronaut in a highly sensitive Mars simulation, the NCIS team must send Ernie into the habitat to investigate alone.