Odo goes behind enemy lines to retrieve a Cardassian informant, but instead finds Weyoun, who wants to defect to the Federation. His knowledge of the Dominion could turn the tide of the war, but Weyoun's replacement clone is determined to eliminate his predecessor, even if it means killing a Founder. Back on the station, Chief O'Brien turns to Nog for help in fixing the gravity generators, but Nog's wheeling and dealing may cause more problems than it solves.
This episode contains examples of:
- Bittersweet Ending: O'Brien and Nog's plot ends rather happily, but Odo's is an outright downer.
- Chain of Deals: O'Brien and Nog's storyline.
- Chekhov's Gun: The Vorta implant for voluntary suicides.
- Cloning Blues: The Weyouns
- Driven to Suicide: Weyoun 6
- Genre Savvy: Weyoun 7 notes how "convenient" it was that Damar was called away mere moments before the transporter "accident" claimed Weyoun 5.
- Go Out with a Smile: Weyoun 6 because Odo gave him his blessing.
- Here We Go Again: After all the deals are resolved, Nog mentions his cousin has a shipment of Sisko's favorite brandy. An interested O'Brien asks, "What does he want for them?"
- Heroic Sacrifice
- Kill the God: Attempted. (From the Weyouns' point of view, anyway. Neither Odo nor Damar buys into the Vorta's religion.)
- Loophole Abuse: Weyoun 7 goes along with Damar's insistence that Odo's Runabout be destroyed by rationalizing that Odo doesn't consider himself a Founder. (He, of course, recognizes the Founders would have them both killed if they learned what they were doing.)
- Make It Look Like an Accident: Weyoun 5 was tragically killed in a transporter "accident".
- Teleporter Accident: How Weyoun 5 died.