Worf's relationship with Dax hits a rough spot, and he plans to discuss his feelings during their vacation on Risa. But things go from bad to worse when they — along with Bashir, Quark, and Leeta — arrive on the beautiful, climate-controlled "pleasure planet." Worf learns that the Temtibi Lagoon's "social director," Arandis, is a former lover of Curzon Dax. Then, Worf falls under the influence of the New Essentialists Movement, a group bent on "restoring the moral and cultural traditions of the Federation." Its chairman Pascal Fullerton's goal: shut down Risa.

Chase Masterson (Leeta)
Monte Markham (Pascal Fullerton)
Vanessa Williams (Arandis)
Frank Kopyc (Bolian Aide)

• The title is a misquote of John 8:7: "So when they continued asking him, he lifted up himself, and said unto them, He that is without sin among you, let him first cast a stone at her."
  
• The title is also grammatically incorrect. It should read "Let him..."
  
• Worf tells Dax that he accidentally killed a human boy during a sports game when he was a child. Since then he has restrained himself.