Visible crew/equipment: At the end of the episode when Number 6 gives Number 2 the device and tells him to leave the island immediately you can see the shadow of the boom microphone on the stone wall behind them at the top right of the screen. (00:47:17)
Continuity mistake: Monique's position on the floor reverses while she's unconscious. When she first collapses, her feet point to the corner of the room. When she comes to, her head is toward the corner. When she gets up, her feet are oriented toward the corner once again.
Continuity mistake: The towel in Number 6's locker changes colors. When we first see the locker opened, the towel is white. A few shots later, when it's opened again, the folded towel has turned blue.
Continuity mistake: The cape Monique is wearing disappears when she's in the watch shop, then reappears a few shots later.
Continuity mistake: A sleeping Number 6 is being observed by the Village girl. While she watches him, his bed clothes mysteriously rearrange themselves. First they're disarrayed, then they're neatly tucked over him and his robe has moved to a different place on the bed. A few shots later, when he wakes up, his pillow disappears.
Continuity mistake: When Number 6 buys soap and candy from one of the Village vendors, he removes his payment card from his pocket three different times without ever having put it back.
Continuity mistake: During the scene in the bell tower, watch the beach in the background. In one take, the tide is in. In the next, it is suddenly at low tide, with much more of the beach exposed.
Revealing mistake: After Number 6 has left the Council Chamber for the first time and is heading home, a white car is seen passing by. (00:09:10)
Visible crew/equipment: When Number 6 is hypnotising Number 86 with his wristwatch, as the camera moves in towards 86, you can see its shadow cast on 6's sleeve. (00:42:39)
Revealing mistake: At the end of the episode when Number 6 and Number 2 are addressing the crowd, in the long shots facing 6 and 2 you can tell Number 2 has been replaced with a double. (00:47:51)
Continuity mistake: Watch the Butler standing in the background after the committee exits the meeting room. A very bad edit causes him to jump to a different position (a foot further away than he was before) between shots.
Revealing mistake: Number 6 sets up exercise equipment in the woods and performs several athletic stunts on a bar. In close-up, he's bare handed. In long shots, however, the stunt double becomes apparent because he's wearing gloves.
Revealing mistake: The ultra-secret location of The Village is accidentally revealed when Number 6 drinks his tea. While everything in The Village is supposed to bear only its penny farthing logo, the bottom of the tea cup is emblazoned "Portmeirion Pottery." "The Prisoner" was filmed in the Welsh resort village of Portmeirion.
Continuity mistake: An estate car can be seen crossing the background in one scene, as opposed to the village "taxis."
Do Not Forsake Me Oh My Darling - S1-E13
Revealing mistake: When No. 6 is putting the 4 slides together to get the location information for Seltzman, as the slides are dropped into the top of the projector, they drop down the screen. However, a projector inverts slides, so they should slide up from the bottom. Also, when the last slide is dropped in, the final letters fade into view and not slide down as would be expected. (00:33:30)
Do Not Forsake Me Oh My Darling - S1-E13
Audio problem: When Number 6 tells the Kandersfeld waiter that he took some photographs, we hear his words, but his mouth doesn't move.
Do Not Forsake Me Oh My Darling - S1-E13
Continuity mistake: When Seltzman is talking to Number 2, there's a chair beside the tea cart with a foot rest, visible in the shots from behind Number 2. But when the camera angle changes to Seltzman's POV, the same chair appears in the shot - without its foot rest.
Do Not Forsake Me Oh My Darling - S1-E13
Continuity mistake: In Number 2's office, the Colonel stands at the bottom of the ramp. In the next shot, however, he's suddenly beside the tea cart instead.
Do Not Forsake Me Oh My Darling - S1-E13
Continuity mistake: Number 6 pulls up to his London flat and there are six cars parked across the street. When he gets out just seconds later, there are only two cars parked across the street.
Do Not Forsake Me Oh My Darling - S1-E13
Continuity mistake: The configuration of the photos on display in the camera shop changes completely from one angle to the next, depending on whether the camera view is from the outside looking through the window, or from the inside looking out.
Answer: It's even more obvious than you think, you know who number 1 is in the very first episode. When 2 replies to the question "who is #1?" Change the way he answers from you are number one (in the monotone or accented answer to, "You are, number 6. The comma gives you the answer. #6 is #1. It's the tone of the answer.