During the production of the last four episodes of The Prisoner series (the episode "Living in Harmony" was being made) ITC arranged for a press conference to take place at MGM-British studios in Borehamwood on 20 September 1967 - a week before the scheduled transmission on some British TV channels. Two episodes - "Arrival" and "The Chimes of Big Ben" - were played to the press. Both episodes had different title sequences at start and finish to that eventually broadcast, as well as with different theme music (by Albert Elms rather than Ron Grainer) and different edits of scenes including different shots and extra dialogue. The alternative version of "Arrival" was released by the Network imprint on DVD in the UK in 2003. (thetvdb.com)