Erin Allin O'Reilly as Cheryl
Episodes 2
The Middle-Earth Paradigm
October 29, 2007
• 21m
1x6
Penny hosts a Halloween party, putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.
Read MoreThe Pancake Batter Anomaly
March 31, 2008
• 22m
1x11
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.
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