Ties of Blood and Water, DS9 5
Think Kira has worked out all her mishigoss from the Occupation? Think again.
Remember that time she allied herself with a dissident Cardassian (back when she was kidnapped and made to think she was a Cardassian?) Well, that dude is back and about to die and wants to do the ceremonial brain-dump of secrets. This becomes a two-way street. Also becomes an opportunity for Dukat and the Vorta Weyoun (remember that guy?) to visit the station and shed some light on the new Dominion Alliance.