Season 3, Episode 18 - The Pants Alternative
Aired March 22, 2010
When Sheldon receives a coveted award, his fear of public speaking threatens to stop him collecting the achievement. After his friends try to help him work through his fears, a surprisingly uninhibited Sheldon takes the stage.
Season 4, Episode 12 - The Bus Pants Utilization
Aired January 6, 2011
Leonard has an idea for a smartphone app, so the gang work together to start developing it. When Sheldon starts to take over the project, his and Leonard's friendship is put at risk after Leonard fires him.