When Sheldon is accused of sexual harassment, he ends up getting Raj, Leonard and Wolowitz in trouble too.
The Santa Simulation
During a game, Sheldon revisits Christmas memories; Amy, Penny and Bernadette look for a date for Koothrappali.
The 43 Peculiarity
Raj and Howard try to to figure out why Sheldon disappears at 2:45 every afternoon; jealousy arises in Penny and Leonard's relationship.
The Fish Guts Displacement
When Amy gets sick, Sheldon tries to nurse her back to health; Wolowitz and his father-in-law plan a fishing trip.
The Habitation Configuration
Bernadette wants Wolowitz to move out of his mom's house; Sheldon is caught in the middle of Amy and Wil Wheaton's argument.
The Parking Spot Escalation
Sheldon and Wolowitz's fight over a parking spot at the University impacts the whole gang.
The Extract Obliteration
A game threatens Sheldon's relationship with Stephen Hawking; Penny secretly signs up for a college class.
The Bon Voyage Reaction
When Leonard is considered for an exciting research opportunity, Sheldon becomes jealous and tries to scare him into backing out. Meanwhile, Raj's relationship with Lucy is strained when he tries to get her to meet his friends.
The Holographic Excitation
The gang heads to Stuart's comic book store to celebrate Halloween; Leonard uses science to seduce Penny.
The Love Spell Potential
Amy and Sheldon's relationship takes a surprising turn during a game of "Dungeons & Dragons;" Lucy and Koothrappali have an awkward date.