A chance meeting in the elevator sparks a new friendship between J.D. and the mysterious Danni whose ongoing dialogue about her ex forces J.D. to talk about his feelings for Elliot. Meanwhile, Carla's brother Mark comes to visit, but he still hasn't forgiven Turk for mistaking him for a waiter at their mother's funeral. Unfortunately, Turk can't even apologize because Mark refuses to speak anything but Spanish.
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