The victim in NCIS's latest murder case reveals a potential connection to Ducky's estranged childhood best friend. As such, Ducky and Bishop travel to London to interview the victim's family and co-workers while Ducky reflects on the choices he made in the past and how they've ultimately affected his entire life while back in D.C., Gibbs, Tony and McGee continue investigating the case but soon discover that the case is not as simple as originally thought....