Erin Allin O'Reilly

Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz and Koothrappali through a new test of their social skills.

With his friends knowing how sour he acts when sick and avoiding him as a result, Sheldon is nursed by Penny, who hasn't a clue what she's in for.

今天是韋理察的生日，貝美蘭邀請他參與一生可能只遇一次的病例。紀曼迪聘請了一個研究助理來協助她的門靜脈研究，而被蔑視的杜歌莉令德瑞克大吃一驚。同時，謝恩幫助楊天娜的臨床試驗篩選候選人，並遇到了一名需要他幫助的年輕孕婦（Keke Palmer飾）。

瑪莉尤妮絲修女驚恐地發現黑衣天使降臨荊棘崖。基特做出大膽舉動，與葛蕾絲重聚。