While Penny worries that dating Leonard has ruined her for normal guys, Wolowitz and Koothrappali search for Sheldon’s perfect match online.

Leonard tells Penny about how he met Sheldon for the first time…and what happened to the elevator.

Leonard and Sheldon compete for the attention of a famous female physicist.

When Leonard and Penny aren’t speaking, Sheldon goes to extremes to keep them both happy.

A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.

Sheldon’s fear of speaking in public threatens his ability to accept an award.

The discovery of a prop ring from The Lord of the Rings movies puts a strain on the guys’ friendship.

Sheldon winds up in traffic court when he gets a ticket because of Penny.

Leonard faces a dilemma in choosing between Sheldon or Penny to accompany him to Switzerland to see CERN’s Large Hadron Collider on Valentine’s Day.

Leonard faces a dilemma in choosing between Sheldon or Penny to accompany him to Switzerland to see CERN’s Large Hadron Collider on Valentine’s Day.