 This is the second occasion in the show's history that the issue of whether or not Rodney and Del share the same father is raised.It had previously been brought up in "Thicker than Water" when their estranged father Reg tricked them into believing that Del was not his son, though this was later exposed as a result of troublemaking on his part.Although Albert assures Rodney that the suggestion that he was fathered by Freddie Robdal was just a rumour, "Sleepless in Peckham" settles the issue that Freddie was Rodney's father.