This episode is a direct continuation from one the best Star Trek episodes ever, Mirror Mirror. In this universe we see a very different Deep Space Nine to the one we're used to. Nana Visitor puts on a fantastic performance as two Kiras and a very different 'alternate' Kira. Amazing to see the impact of Kirk's words to Spock at the end of the aforementioned episode and how cataclysmic the changes were when Spock had initiated a change on the way the Empire had ruled and eventually led to the Empire losing it's stranglehold over the Galaxy. This episode is continued brilliantly later in the show's run and gave a lot of characters in the mirror universe a brilliant twist in character!!
Review of Crossover
