Season 2 are dealing here with character growth, including Sheldon being increasingly obsessive. Leonard and Penny’s relationship takes a turn for the worse when they break up but is speedily resolved. Soon their relationship progresses into a stronger friendship than before, while Sheldon and Penny’s friendship slowly begins. In the season finale Penny hints at her true impressions for Leonard. Howard’s character remains similar to that of season one in his attempts to seduce girls,& lastly, Rajesh manages to briefly communicate an apology to Penny without having ingested alcohol.