Corrected entry: In early episodes, the front door of the flat leads out into the side of a coridor but, in later episodes, it leads directly into a small room.
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?
Correction: It's revealed at the end of Thicker Than Water that Del's blood group (having visited the doctor again) is actually A, and that Reg had opened the results and edited Del's blood group from A to AB. It's also explained that siblings can have the same parents, but different blood groups.
Correction: It's amazing how you typed all this when it was all explained in that episode. Del does have the same blood group, but it didn't matter anyway as everyone in the family can still have a different blood group. Rodney's blood group could quite easily have been the same as Del's despite having a different father and vice versa.
Correction: If you watch episode 1 from series 1 you will see when Rodney walks out the flat, that it goes to a small room the same as those in later seasons.
Ssiscool ★