Visible crew/equipment: When Rodney and Del are back in their own flat, Del is pouring a drink, the shadow of a boom mic can be seen on Rodney's shoulder right up until Rodney walks away.
Visible crew/equipment: When Del goes back to the bar after realising that Debbie is his, in the top left of the screen, a shadow of a boom mic can be seen moving away near the "Carlsberg" sign.
Visible crew/equipment: When Del and Rodney are in Debbie's flat, Del and Rodney are talking about June not having a record player. A shadow of either a camera or a crew member are visible on the open front door.
Visible crew/equipment: At the start when Del is talking to Trigger, a light screen is reflected in Del's glasses. (00:02:00)
Visible crew/equipment: When Del picks up the hat off the car, he starts to walk to the grave. When he does, the camera crew and equipment are reflected in the car's paint. (00:02:55)
Audio problem: When Rodney chucks the hat into the grave, the noise it makes is of something a lot heavier. (00:04:35)
Continuity mistake: When Trig puts the fags down on the table he puts down 3 packs, then another 3 packs, then the camera does a closeup of them on the table. There are now only 5 packs. (00:06:25)
Continuity mistake: Del puts his fork down on his plate at the apartment. Camera cuts and it has changed position without Del touching it. (00:13:25)
Visible crew/equipment: When Rodney and Del are talking in the pub a boom mic is reflected in the picture above Rodney. (00:24:30)
Visible crew/equipment: When everyone's back at the flat, as Del Boy is looking straight down the hallway to his and Rodney's bedroom, someone comes up to him and he turns around. When it goes from his close-up to the wide shot of everyone else the shadow of the camera reversing backwards is visible for a few seconds.
Hole in One - S4-E3
Revealing mistake: When the post is being posted through the door, you can see the letters appear in the letterbox and then wait a few seconds for Albert to hang his coat up before being pushed through. (00:01:00)
Hole in One - S4-E3
Continuity mistake: At the begining of the episode, there is a box that is by the table Rodney is sitting on. A little later, Albert and Del come and open that box. The box disappears and then reappears between shots. (00:02:05)
Hole in One - S4-E3
Continuity mistake: When Rodney says "yeah he did. The landlord.", in reply to Solly, he has a glass up to his mouth. In the next shot, he has obviously just swallowed what was in there, the glass is back on the table and you can see his cheekbones moving.
Hole in One - S4-E3
Revealing mistake: Uncle Albert is seen putting the post back through the letter box. If you watch the scene carefully, the letters appear to pull themselves through, no doubt with a helping hand from the crew.
It's Only Rock and Roll - S4-E4
Factual error: When Del is running out of the pub, him and one other are carrying guitar amp heads and are flinging them about with ease. Heads weigh around 20-30 kg each and would be extremely hard to fling around in such a way as they are. (00:17:00)
Continuity mistake: When Rodney gets the bag with the food in it, as he is about to get in the car, you can see behind him that he has left it on the driveway.
Watching the Girls Go By - S4-E6
Revealing mistake: At the start, Mickey Pearce is playing darts in the pub by Boycie. On the 3rd dart, he actually aims for the floor behind Boycie to make it seem like the dart bounced off the board. (00:01:10)
Watching the Girls Go By - S4-E6
Continuity mistake: Del asks Mike for 3 scotches. If you look closely, the glasses that Mike picks up have already got Scotch in them. He then proceeds to go to the optics to put scotch in the glasses. (00:02:35)
Visible crew/equipment: At the start when Arthur says to quieten down, there is a reflection of movement in the butter dish between Del and Rodney, that can only be the crew. (00:01:25)
Visible crew/equipment: When Rodney says the scientific name for the butterfly, a boom shadow moves over Del's arm. (00:04:40)
Chosen answer: An apparent long string of illnesses.