Sloan returns to Mark’s apartment just as she’s going into labor. Teddy, Mark and the still-fighting Callie and Arizona are there to help with the birth and to get Mark through his grandson’s pending adoption. Meanwhile Teddy sees Derek’s invitation to illustrious cardiothoracic surgeon, Tom Evans, as a threat to her future employment at the hospital The team works on a crab boat captain who has been stabbed with a giant shark hook.