When an NCIS case reveals a connection to Ducky's estranged childhood best friend, he and Special Agent Bishop travel to London for interviews with family and coworkers of his friend.
Max enlists Kyles help with the recent abductions, and Michael does his own investigation into Alex's disappearance.
Maura embraces her new journey, but nothing about life as a woman is easy; Sarah introduces her husband to her ex-girlfriend Tammy; Josh pays a visit to his ex-babysitter, Rita; Ali gets closer to her trainer.
Mort gathers his children together to tell them something important; they fear he has cancer, but his real revelation shocks the entire clan.
Maura moves out of the family house and into a lively new apartment complex, just as Sarah needs a new home after dismantling her perfect life; Josh has to reconsider his sudden vision of starting a family; Ali finds some new boundaries to cross.