While Kitty tries to find a runaway teen, Sherlock and Joan work a case in which the murder of a brilliant bioengineer looks to be at the hands of a…

Fin investigates a man’s claim that his sister was gang raped.

Rebecca hosts a dinner party. Kevin tries to support those around him. Randall faces concerns about how his family is adjusting to their new home.

Kevin reflects on his past. Rebecca visits Randall at college. Beth’s mom comes to visit. Kate and Toby share new experiences with Baby Jack.

Beth’s trip home to care for her mother sparks an unexpected realization.