<P> The exact size of the environs of the Village is never established on screen . Besides the townsite, which is known to include a hospital building, there are forested, mountainous and coastal areas . The Village is large enough that one episode ("Living in Harmony") established that an entire Old West town and environs was built somewhere in the vicinity . In "Arrival", "Many Happy Returns" and other episodes, Number Six actually views the Village from the air, yet is apparently unable to spot any surrounding towns or cities . In other episodes (depending upon the camera angle), buildings can clearly be seen on the far side of the bay . Nevertheless, all maps of the Village seen in the series display little beyond the central townsite, indicating that the village is surrounded on three sides by mountains (said mountains are seen by No. 6 in "Many Happy Returns") and sea on the fourth, though the map does show a road leading off the map which may connect to the other areas, such as the Village hospital which is depicted as being in a field - like area away from the core Village (at least in some episodes like "Arrival"; in others, such as "Chimes of Big Ben", it is shown to be overlooking the central plaza of the Village). </P> <P> For official identification purposes, all residents and staff of the Village are assigned numbers in lieu of names, and with very few exceptions the use of proper names is forbidden . Numbers are reassigned as and when the current holder leaves the Village . The actual population of the Village is unknown - other than that there are some residents whose numbers are in the low triple digits (and in "The Schizoid Man" a private residence is briefly seen with the number 241) and save for Number 2, the numbering appears to have no bearing on one's authority or rank within the Village . Most identification badges are white, but some are black . The only character never seen wearing a number badge (other than Number 6, who refuses and is only seen wearing a badge on a couple of occasions) is the unnamed Butler who serves Number 2; his number (if he has one) is never revealed . Similarly, only one character - a woman in "The Schizoid Man" who befriends Number 6 - is consistently identified by a proper name, and never by her number . </P> <P> Scenes of the Village were filmed in the grounds of Clough Williams - Ellis's Italianate Hotel Portmeirion, a resort near Penrhyndeudraeth in North Wales . Principal location shooting took place over four weeks in September 1966, with a return visit for additional, second unit - style shots for later episodes in March 1967 . Sections of the resort (such as Number 6's residence interior with exterior) were replicated at MGM Borehamwood Studios in England . Later episodes were shot almost entirely on the sets on MGM's sound stages and backlot and locations within easy reach of the studio at Borehamwood, (e.g., in "It's Your Funeral", "A Change of Mind", "Living in Harmony", and "The Girl Who Was Death"), and by reusing Portmeirion footage from earlier episodes the production company was able to save the expense that further principal photography at Portmeirion would have cost . Note that Portmerion was used as a background in Danger Man to show a foreign location--the episodes were "View From The Villa", "Under the Lake", "The Honeymooners", "Find and Return", "The Journey Ends Halfway" and "Bury the Dead". </P> <P> There is an extensive network of tunnels and caverns under the Village, connecting many of the public buildings, and a number of secret facilities and support services (plumbing, waste disposal, observation cameras, etc .). These are generally off - limits to all prisoners above, but they appear to be extensively utilised, given the amount of motorcycle traffic observed in them in the final episode . There appears to be a large liquid - filled underground chamber that looks similar to a lava lamp, probably a short distance off the coast, in which Rover resides when it is not being used . The normal background display of the large monitor in Number Two's office is a view of this chamber, and lava lamps are visible in virtually every public building in the Village, giving rise to the speculation that these lamps may have functioned as some extension of Rover itself . This was never directly referred to on screen . </P>

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