I have pickked up 3 short episodes produced by HBO which are not listed as specials. In imdb it is listed as a separate show (probably webisodes) I have the episodes but not a lot more information
The episodes are:
(1) Young Proposition Joe (1962) {running time 1:49, (c) 2008}
(2) Young Omar (1985) {running time 1:49, (c) 2008}
(3) When Bunk Met McNulty (2000) {running time 2:44, (c) 2008}
On the Amazon Books web page I found the following notes:
1. In November 2007, during the hiatus between Seasons Four and Five, HBO.com released three short "prequels", called The Wire: The Chronicles.
www.hbo.com/thewire/chronicles/ . One of these features Proposition Joe in 1962
2. Another entry in The Chronicles shows a very young (12-year-old?) Omar, already with his distinctive scar, in 198

