Audio problem: When Number 6 tells the Kandersfeld waiter that he took some photographs, we hear his words, but his mouth doesn't move.

Continuity: 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.

Revealing: 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.

Continuity: 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.

Continuity: 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.

Continuity: 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.

Continuity: When the Colonel enters Number 2's office/control room, the doors close as he comes down the ramp. In the next shot, however, the doors are still open.

Continuity: Driving his Lotus through London, Number 6 passes a hearse. But when the shot cuts to a wider angle, the hearse disappears.

Continuity: Between shots, the bodies of both Kathy and the Kid change positions on the floor. Kathy's has moved away from the stairs, and the Kid's reverses directions.

Continuity: In full shots, the judge's cigar is in his mouth. Every time a close-up is intercut, the cigar is in his hand.

Continuity: Twice in this episode (once in the saloon and once in the sheriff's office), Number 6's coat is unbuttoned when he's inside, but has instantly buttoned itself up when he runs outside.

Continuity: The drink Kathy brings the Kid changes positions on the table between takes. She places it on top of the small book, but it moves itself to the larger book, then back to the small one again, and so on.

Revealing: When the red handkerchief is tied to Number 6's hand, Patrick McGoohan's wedding ring is visible in the close-up.

Continuity: While Number 6 is being dragged behind the horse, a red bandanna tied around his hand disappears and reappears several times between shots.

Continuity: While Number 6 is in the jail cell, he lights a cigar and starts blowing smoke. Just a few shots later, the smoke has vanished and he lights the cigar again.

Continuity: Number 6 is sitting in jail rolling a cigarette. In the long shot, you can see that he's just exhaled a cloud of cigarette smoke. But, in the next shot, he has just finished rolling the cigarette and has yet to light it.

Continuity: At the final shoot-out, the Kid's hat lands and settles right next to his head after he falls. When Number 6 walks past him a few moments later, however, the hat has somehow moved itself more than a foot away.

Continuity: The judge has two glasses in front of him on the bar. When the shot changes, there's just one glass.

Continuity: In the saloon, between close-ups and cutting back to the master shot, the glasses in front of the men at the bar change positions repeatedly.

Audio problem: For some reason, "Londonderry Air" was dubbed over the original song being performed by the actors/singers. Their lips aren't moving in sync with the words at all.