There has been much debate, among Prisoner fans, as to the "correct" order of the episodes. The above makes the order clear. In particular events in the Village follow 2 calendar years. He arrives in the fall, and the 8 episodes progress around the calendar in order (outer ring of figure)-- and then he stays a 2nd year, and the episodes progress around the inner ring. It ends with Fall Out, which interrupts the story before it begins again.
There are several dates explicitly named in the story. February 2nd comes up repeatedly in Schizoid Man, Many Happy Returns ends on the Prisoner's birthday, which he states in Arrival is March 19th. Dance of the Dead takes place during "carnival". Placing the episodes on the calendar year also pairs the episodes, and twin episodes have a lot in common: for example A B and C and Living in Harmony both take place in other worlds, Free for All and It's Your Funeral both deal with transfer of Number 2's power, Schizoid Man and Change of Mind are both episodes where his identity is attacked, Dance of the Dead and Girl who was Death both have to do with Death.
(There are several things in the scheme above that I am not positive about. One is spanning arrival over 2 periods. On the one hand, there are 2 number 2's, so that would support it. On the other hand, if only the September arrival is kept, that moves Chimes to the outer wheel (along with the Fall in Fall Out), which is nice because the outer wheel episodes seem to be more about him as an individual, and the inner wheel episodes seem more about his relationship and role within Village society.
One other possiblity (and this changes episode order slightly) is that Chimes and The General should swap. In fact this may be correct instead of what I have above, because it preserves more symmetry in the interleaving of the 2 partial orders (see next section). On the surface, Chimes and Arrival look like they ought to be twins because of the commonalities between the two arrivals, his and number eight's, and the failed escape. On the other hand, supporting the swap, the failed escape in Arrival is in the 2nd half of the episode, and so matches with the failed escape in Checkmate. The first half of Arrival involves the structure of village society, and The General does too. On the other hand, both the General and Once Upon a Time are about the imprint of history on development (the General in the external world, Once Upon a Time in the internal world) and both end with a "double" of 6's getting killed. On the other hand, in Chimes of Big Ben, they make a big deal of his watch saying 8, when there was 1 hours difference! Is this signalling the offset of Arrival and Chimes in the cycle?? On the other hand... :-)
Note: the above doesn't metion "Do not forsake me, oh my darling." I think this was possibly meant as a substitute for Chimes, to fall a year from Arrival. Chimes, when the scene where he looks for the stars was removed (see video release "Alternate Chimes of Big Ben") might have been meant to pull back as a duplicate Arrival (and used as the 2nd episode in the series).