. . . . . . . . . . . . . . . . . . . . "The social group or Team Leonard was formed when Leonard befriended Howard and Raj, as told in retrospect in \"The Staircase Implementation\" (3.22). As Sheldon was living with Leonard, Sheldon constantly butted in when the three were hanging out and he quickly became a member of the group. He later established himself as the group's leader and comic relief although no one agreed that he was either. Even though Sheldon is not the leader of the group. Stuart was invited by Raj into the group in \"The Decoupling Fluctuation\" (6.02) after Howard went to space,"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "The social group or Team Leonard was formed when Leonard befriended Howard and Raj, as told in retrospect in \"The Staircase Implementation\" (3.22). As Sheldon was living with Leonard, Sheldon constantly butted in when the three were hanging out and he quickly became a member of the group. He later established himself as the group's leader and comic relief although no one agreed that he was either. Even though Sheldon is not the leader of the group. Penny joined the group after moving next to Sheldon and Leonard in \"Pilot\". She was \"officially\" recognized by Sheldon as a permanent member of the social group in \"The Panty Pi\u00F1ata Polarization\" right before she was banished briefly for unwilling to move away from Sheldon's Spot. Or when Penny officially acknowledged that they were friends in \"The Euclid Alternative. Bernadette joined shortly after started dating Howard in \"The Gorilla Experiment\" (3.10). Amy started hanging out with the group in \"The Zazzy Substitution\" (4.03), and she mentioned officially being part of the group in \"The 21-Second Excitation\" (4.08). The three girls formed their own social group and have frequently been hanging out together. Raj's sister Priya started hanging out with everyone in the group after she had developed a relationship with Leonard during her stay in Los Angeles, as seen in \"The Cohabitation Formulation\" (4.16). However, the other girls actually formed a Priya-hating group behind her back in the beginning as she and Penny had not got along because of Penny being Leonard's ex. They began to accept each other eventually. However, Priya soon returned to India and was out of the group. Stuart was invited by Raj into the group in \"The Decoupling Fluctuation\" (6.02) after Howard went to space, and Sheldon approved of him staying in the group around the time of Howard's return when he offered the guys 30% off at the comic book store in \"The Re-Entry Minimization\" (6.04). Sheldon once \"befriended\" Kripke so as to use the new Open Science Grid Computer that Kripke controlled. He had to kick Raj from his friends because he could not maintain five friendships. He ousted Kripke and got Raj back shortly afterwards when Kripke told him time on the computer followed an official schedule instead. Amy forced Sheldon to realize that Leonard was the true nucleus of the group instead of him in \"The Toast Derivation\" (4.17). As a result, Sheldon tried to create a new social group with himself as the leader. He invited Stuart, Kripke, Zack and TV's LeVar Burton over to his apartment for a good time. Burton did not show up (until very late). Sheldon abandoned his new friends when \"they were having fun wrong\"."@en . . . . . . . . . . . . . "The Social Group"@en . . . . . . . . . . . .