>Retroactive Continuity.  When the folks producing a given show decide to
 >change an element of the show and write the change as if it had always been
 >that way.  Examples in ST include the Klingons and O'Brien's rank.
What do you  mean by Klingons?
If their looks, then no, RETCON doesn't help much, because there's no data on 
why they changed, instead of RETCONning the fact that they were always that 
way, because of Worf's statement, and Odo's lack of recognition.
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