Raj and Howard show Penny the gifts they bought Leonard for his birthday. Penny asks Sheldon why he didn't buy Leonard a gift, and Sheldon explains that he finds gift-giving irrational.
Penny, Amy, and Bernadette go to a clothes donation bin to donate some of Penny's clothes and are tempted to take clothes for themselves.
Howard buys the guys a “Fantastic 4” comic book to celebrate his upcoming marriage.
Penny buys Leonard & Sheldon a Star Trek Transporter.
Sheldon's World of Warcraft account get hacked.