Spoilers ahead for Industry Season 1, Episode 4.

Yasmin has spent the season relying on charm and linguistic skills (she speaks seven languages) to mask her lack of quantitative instinct. In "Seder," that mask slips. Tasked with executing a complex, multi-leg derivatives trade for a prickly client named Felix, Yasmin is given a specific instruction: avoid slippage, or face the consequences. The episode’s title card could have easily been a glossary entry. In trading jargon, a D’Thrip (pronounced dee-thrip ) is an obscure piece of market slang for an error of three ticks—a small but humiliating mistake on a trade execution. It’s the kind of error that doesn’t bankrupt a bank but does bankrupt a junior trader’s reputation.

Eric invites Harper, Yasmin, and Robert to his home, ostensibly to mentor them. But Eric—a master of psychological warfare—uses the dinner to administer a loyalty test. He forces Yasmin to recount her D’Thrip error in front of the entire table, including his intimidating wife and a visiting managing director.

The final shot of Yasmin’s reflection in the HR glass—a perfect visual metaphor for a career that has suddenly become very fragile, very transparent, and very close to breaking.