قسط 4: B3 کی سادیست ورنڈر کیتھی، رچل اور زک کو سزا کے طور پر جان لیوا چالوں سے گزرتی ہے۔

Rachel and Zack discover that B3 is controlled by Cathy, a sadistic prison warden who forces the pair through various obstacles and booby traps as punishment for their crimes. In the first room they enter, Zack is trapped in an electric chair and is repeatedly shocked, with Cathy giving Rachel a hint on how to rescue him. Rachel figures out that the dummies in the room are controlling the chair. Upon destroying the dummies, Zack is freed and the door to the next room is unlocked. They enter and are trapped in a gas chamber slowly filling with poison gas. Cathy explains they must solve a puzzle to escape and they have one gas mask to share, but they have a limited time before she releases an even deadlier poison gas that renders the mask useless. Rachel seemingly solves the first stage of the puzzle by balancing a scale, but she begins to succumb to the gas as the time limit runs out. (Source: Wikipedia)

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