Nick sees references in his dad's diary to meetings with a man named "C". Nick and Lisa go to Italy to try and locate a private investigator who did work for Nick's dad and to bring back a special bottle of wine - a Chiavennasca - for Tripp. Karen and Freddie find out about their trip and tag along. Karen lets slip to Lisa that Nick proposed to Karen when they were both 19. The P.I. Harold Templeton tells Nick that his dad asked him to dig up details on Simon Elder and then on Tripp. Tripp finds out that one of his children is not his. Juliet finds out about Jeremy's affair with Natalie. Natalie tells Jeremy she is pregnant. Simon Elder approaches Nick as he leaves work and they drive away - the license plate on the car has one initial "C".