This episode consists of Data making a personal log in order to send to Dr. Maddox--the android scientist who would like to one day make his own version of Data. In it, Data talks about two main topics--- the upcoming wedding of Keiko and Mile O'Brien as well as the odd occurrences surrounding the Vulcan ambassador's time on the Enterprise. As for Keiko and Miles, Data is completely clueless that Keiko's hesitance to marry is based on a case of nerves and he feels that he must fix this 'problem'. And, the mystery concerning the Vulcan ambassador's death--which, to me, was a VERY simple mystery to solve and which I figured out INSTANTLY. The crew, inexplicably, was clueless and Data only figured it out when he began thinking like Sherlock Holmes. Way to go, Sherlock!
So is this worth seeing? Yes. However, the second plot involving the Romulans and Vulcan ambassador was very weak. As for the rest, it's mildly diverting and nothing more--enjoyable but not exactly memorable.