Creepy Child: During production, the showmakers decided an animatronic baby would be less trouble than a real one. And decided to hire, of all people, the creators of Chucky to make it. The results were predictably creepy. And a real baby was used in the end.
Cyanide Pill: Promazine, the pill that the cultists were going to use. It was developed by the Cardassian Obsidian Order for their agents in the event of capture. Not only does it kill, but it causes the body to crumble to dust not long after, leaving no evidence behind.
Driven to Suicide: One of the cultists willingly swallows his promazine pill, even though it's been revealed that Dukat is a fraud.