 The costumes worn throughout the series are in fact the sports  uniforms of Mill Hill School in North London. MacGoohan moved into a  house opposite the school, while developing the series. It had an  eccentric selection of blazers and ties in the schools chocolate and  white colours. One day he walked into the school shop and ordered  the full range from the outfitter. While in the area he befriended  the actor Ian Carmichael (I) (qv) and the pair of them used to  walk their dogs in the school grounds, The Prisoner and Bertie  Wooster, with matching Labradors.