When Gloria's mother and sister visit, they bring traditions, baby names and family baggage; Phil helps the kids with their problems; Mitchell and Cameron try to correct Lily's bad habits.
Following the storm, a mudslide injures first responders and citizens; Meredith faces a decision that will impact a loved one; Callie is rocked by Arizona's infidelity.
Paul stands in the way of Susan receiving a kidney transplant; Tom passes up a lucrative job to continue working with Carlos; Andrew's alcohol consumption increases, worrying Bree.
The team works on unraveling a psychopath's clues in hope of saving his most recent victim, as one member of the group struggles for life.
When the CFO of a Fortune 500 company is found strangled in her home, Bernard and Cosgrove work to connect multiple dead ends to find her killer; McCoy and Price butt heads over a choice that could cost them the case.