Season 6, Episode 12 - The Egg Salad Equivalency
Aired January 3, 2013
After Sheldon's assistant makes a move on Leonard, his plan to focus her mind back on work lands him with a sexual harassment complaint. When Sheldon has a meeting with the human resources department, he gets his friends in trouble, too. Meanwhile, Penny feels insecure about her relationship when she learns Alex was hitting on Leonard.