Corrected entry: In "Thicker Than Water", when Del and Rodney's dad returns claiming he has an illness, he persuades them both to have a blood test to reveal if they have the same illness. When they get the result, it's revealed that the blood groups of Del and Rodney are different (Rodney being "A" and Del being "AB"). Not long after the reveal, Dad tells them that Del is the one with the different blood group and is the one with a different dad. This gets forgotten, as at the end the dad was just dismissed as Del tells Rodney that he went for another blood test but got told there was no point. As the programme goes on, we have the episode "The Frog's Legacy", which is the first inkling that Rodney has a different dad, but they just dismiss it -- until the final episode, "Sleepless in Peckham", when they blow the photo up and it is revealed that Rodney would have in fact had a different dad. If that is the case, how was it Del had the different blood group to the rest of the family in "Thicker Than Water" rather than Rodney?David Hutchinson
Corrected entry: Del first met Raquel in 1988 in the Christmas episode 'Dates'. At that time, Rodney had not yet met Cassandra (episode was made before series 6 and Rodney was seeing another girl). Del met Raquel again exactly a year later in the 1989 Christmas Special "The Jolly Boys Outing". In this episode Rodney and Cassandra are celebrating their first wedding anniversary.