The Hofstadter Isotope: [s2e20]

Despite being a "nerd," Stuart successfully woos Penny with his artistic sensitivity. Their date goes so well that Penny invites him in for "coffee" (which Penny clearly intends to lead further), but they are interrupted by Sheldon, who engages Stuart in a heated, hours-long debate about who should replace Batman if Bruce Wayne died.

This episode marks Stuart's first appearance. Unlike his later seasons where he is portrayed as increasingly pathetic and sickly, he is initially shown as confident, talented, and a genuine romantic rival for Leonard. [S2E20] The Hofstadter Isotope

In an attempt to move on, Leonard convinces Howard and Raj to take him to a "normal" bar to pick up women. The excursion is a disaster; Leonard feels out of place, and Raj finds success only after becoming incredibly drunk. Key Character Moments Despite being a "nerd," Stuart successfully woos Penny

David Goetsch, Richard Rosenstock, and Steven Molaro. Unlike his later seasons where he is portrayed

"The Big Bang Theory" The Hofstadter Isotope (TV Episode 2009) - IMDb