After the guys return from a Renaissance fair and see Penny with her new boyfriend Eric, Leonard is approached in the Caltech canteen by Leslie Winkle, who proposes renewing their one-time "relationship".
As she has grown out of one-night stands she suggests they take it slowly, first determining their compatibility on all levels before proceeding to full sex (if at all); Leonard can assume the "male role".
Leslie expects Leonard to back her beliefs, but when he supports Sheldon, Leslie dumps Leonard, to Sheldon's relief.
Sheldon then comforts Leonard with the fact that it's only nine months until Comic-Con.
Sheldon attempts to fix Penny a date with the aid of an online dating service, but fails.
In the end, Penny is horrified to realize she has accepted a virtual date with Howard, and promptly stops playing, thus overcoming her addiction.
Leonard then tries approaching her figure within the game, but she merely beheads his figure.
After the party, a very intoxicated Raj returns home with Penny, and via webcam he introduces her to his parents as his girlfriend.Barry Kripke played by John Ross Bowie makes his first appearance In the series starting with this season, He first appears in "The Killer Robot Instability".Following the Season 1 finale, Leonard and Penny return from their first date while Howard and Raj spy on them using a webcam in the hall between their apartments., making his friends jealous, though Leonard finds that they should be happy for him.Raj becomes arrogant after receiving star treatment from Dr.During their dates, Leslie asks how many children they should have and evaluates Leonard's genetic defects.Penny dumps Eric after unsuccessfully using him to make Leonard jealous (including a competitive make-out session between Penny and Eric and Leonard and Leslie, Leslie helping Leonard make his point).Leonard, spotting the camera, suggests going over to her apartment, but she misunderstands him and tells him to "slow things down".The guys try to convince Leonard that the date went badly, which he denies.Penny later tells Sheldon that she lied to Leonard about graduating from community college, feeling he would not want to date a woman who is not smart, and makes Sheldon promise not to tell him.Sheldon cannot easily keep secrets, and moves out of the apartment to escape his inner conflict.