Stardate Unknown: A Bajoran vessel, under attack from a Cardassian warship, sends out a distress call to Deep Space Nine. The station's crew is able to beam the lone Bajoran aboard. Major Kira recognizes the man as an old friend named Tahna, who is a member of the Kohn-Ma, the Bajoran resistance. He requests political asylum, and Commander Sisko allows both the Bajoran and the Cardassians aboard the warship to stay on DS9 while he considers his decision on the Bajoran's request. Meanwhile, Doctor Julian Bashir becomes acquainted with the DS9 clothier Garak, the sole permanent Cardassian resident on the station, and Odo has his hands full with the Duras sisters.

Al becomes frustrated when Peggy can't decide what to wear to a family wedding. Meanwhile, Bud gets to know the bride and Kelly spends time with the bridesmaids.

Fishermen discover that Gotham's fish all have the Joker's colors and signature smile. Batman investigates, and realises that the Joker is hoping to make money off of these new fish by having them trademarked. After two government employees are killed by Joker toxin, Batman examines that specific fish, and sees that it is actually a Japanese one, meaning that the Joker is hiding at the Aquarium. Bullock tracks the Joker down, but is captured and used as live shark bait as part of a trap for Batman. Can Batman save him in time?