As Rodney invites his girlfriend of the week over to the flat, Del Boy gives him a job as a nocturnal security officer (fancy name for night watchman) under the company Trotter Watch. As Rodney is sent to guard a bus depot, Del frightens him by whistling along with him. The next morning at Nelson Mandela House, Grandad tells Del that he used to be a security officer during the war. Rodney is woken up just to hear Del's latest get-rich-quick scheme: Trotters Ethnic Tours! Rodney will drive the bus, Del will be the tour guide, and Grandad will send the leaflets to every part of London.