Visible crew/equipment: In Number 2's chamber Number 6 refuses his offer and says "You won't hold me" as he turns around and goes to walk out. If you look at the bottom right of the screen you can see the shadow of the boom microphone cast on the floor. (00:15:20)
Visible crew/equipment: In the foot-chase-on-the-beach scene, there are tracks in the sand from the camera crew's truck. They vanish and then reappear when the camera angle changes.
Visible crew/equipment: As Number 6 storms out of Number 2's chamber, the camera dolly is briefly visible moving out of his way at the lower left of the screen.
Visible crew/equipment: When Number 6 first walks into his Village bedroom, a film crew member can be spotted walking past the window.
Visible crew/equipment: Watch the bottom left corner of the screen when Rover turns around and begins pushing Number 6 away from the helicopter. A film crewmember's head (probably that of the technician operating the weather balloon that played Rover) appears briefly in the shot.
Visible crew/equipment: When Number 6 holds up the radio, the camera angle tilts just enough to show us a brief glimpse of the top edge of the studio set.
Visible crew/equipment: When Number 2 and Number 6 are talking at the beach there is a shot of Nadia getting into the sea. Just before she takes her sunglasses off you can see rows of spotlights reflected in them. This is because the scene was shot in a studio and not a real beach. (00:15:25)
Visible crew/equipment: When the unconscious body of Nadia is being dragged onto the beach by Rover you can see the distinct shadows of two crew members and the camera being cast on the ground. (00:18:06)
Visible crew/equipment: When Number 6 meets Number 2 at the hospital, the shadow of the boom microphone is visible moving around at the top of the screen (on the wall), just before Number 2 greets him. (00:18:53)
A. B. and C. - S1-E3
Visible crew/equipment: When "A" confronts Number 6, as he attempts to leave the party, there is a shot facing Number 6 with a doorman either side of him and if you look in the top right of the screen you can see a boom microphone poke out from behind the door. (00:12:48)
A. B. and C. - S1-E3
Visible crew/equipment: Just before Number 14 talks to Number 6 (in his dream) you can see the shadow of the camera on the piece of equipment she uses to enter his dream as she walks toward it. (00:25:25)
Free for All - S1-E4
Visible crew/equipment: When Number 6 collapses in the cave drinking den you can see the shadow of the camera cast on the lower left side of the screen as he hits the floor. (00:40:22)
Free for All - S1-E4
Visible crew/equipment: Watch the water at the lower left of the screen as Number 6 makes his speedboat escape attempt. You can see the wake created by the camera crew's boat.
Visible crew/equipment: After uncovering the deception Number 6 enters his doppelgängers home to confront him. As the door opens you can see the shadow of a crew member on the wall next to the door. He is hidden behind the partition. (00:39:18)
The General - S1-E6
Visible crew/equipment: During the street party, when the interviewer asks Number 6 questions about European history, you can see a microphone in the bottom right of the screen. (00:28:08)
Visible crew/equipment: When Number 6 and Number 2 are observing the fate of "the rebel rook", who is being subjected to Pavlovian mind control treatment, there is a moment when the shadow of the boom microphone can be seen cast on the wall at the top-centre of the screen and bobs around for a while. When Number 6 says "you must be proud of yourself." (00:14:36)
Visible crew/equipment: When Number 6 is listening to classical music in the listening booth, each time he puts his head into the booth (after switching records) there is a specific shot behind his shoulder where you can see the heads of two crew members reflected in the glass of the listening booth. This happens 3 times and is very visible on Blu-ray. (00:10:33)
Visible crew/equipment: Just before Number 6 and the woman break into her father's watch shop there is a shot of the shop's front door, as the camera moves in on the door you can see the face of the cameraman reflected in the door glass in the bottom right. (00:32:01)
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)
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)
Chosen answer: We were never told. In the series finale [Spoiler alert] Number 6 demands an answer to that question, only to be shown his own reflection.
Jean G