Continuity mistake: At the end of this episode Harold picks up a knife and chases Albert round the table with the knife in his right hand, but when the door bell rings the knife has disappeared.
Suggested correction: The knife doesn't disappear he actually drops it if you listen carefully.
Christmas Special 1974 (a.k.a. A Perfect Christmas) - S8-E7
Continuity mistake: Harold suggests to Albert that they spend Christmas abroad. Albert has not been abroad since his military service in the First World War, so Harold obtains Albert an up-to-date, modern passport. The fact that Harold has an old passport, but Albert has a newly issued passport is absolutely essential to the story. This contradicts two previous episodes of Steptoe And Son. In Pilgrim's Progress (S4-E7) Albert wanted to re-visit the First World War battlefields: Albert and Harold went to an airport and boarded a plane for France. In A Winter's Tale (S5-E2) Harold bought a ticket for a ski-ing holiday in Switzerland. He had an accident and could not go, so Albert went instead. (Albert would have needed a passport for both trips.) This also contradicts the 1972 Steptoe And Son cinema film, in which Harold married, and took both his new bride and Albert on his honeymoon to Spain.
Christmas Special 1974 (a.k.a. A Perfect Christmas) - S8-E7
Continuity mistake: Harold is looking through the box for Albert's birth certificate - the first two documents he finds are a wireless receiving licence then the Skinners Arms Christmas club saving book. He puts them both down on the table after reading them, the camera cuts to Albert, then when it cuts back to Harold there are now three documents on the table.
Christmas Special 1974 (a.k.a. A Perfect Christmas) - S8-E7
Continuity mistake: When Harold picks up the brochures off the floor then places them on the table to make a decision on where to go on holiday there are two brochures on the table, before he started to pick them up there was only one.
