Aired: October 30, 2007 | Season: 1 | Episode: 6

Overview
Runtime: 21m
Directed by: Mark Cendrowski
Written by: David Litt, Robert Cohen
Guest stars: Brian Patrick Wade, Cynthia Holloway, Erin Allin O'Reilly, Kimberly Kevon Williams, Rachel Cannon
Description
Penny hosts a Halloween party, that ends up putting Leonard, Sheldon, Wolowitz, and Koothrappali through a new test of their social skills.