711-s12-e06-tbbt: Watch

: After Bernadette refuses to make Howard apologize, Amy Farrah Fowler encourages Sheldon to seek revenge. They arrive at Leonard and Penny's costume party dressed as Howard and Bernadette . Amy delivers a particularly sharp, high-pitched impression of Bernadette's voice and abrasive personality.

: Howard Wolowitz decides to dress up as Sheldon Cooper for Halloween at Caltech. Sheldon is initially oblivious, but once he realizes everyone is laughing at his personality quirks—rather than with him—he feels deeply insulted and hurt. Watch 711-S12-E06-TBBT

: The mocking hit a nerve with Bernadette, who admits she has always felt she needed to be "tough" to be taken seriously due to her small stature. Sheldon and Bernadette eventually bond over their shared history of being bullied as children—Bernadette for her size and voice, and Sheldon for his intelligence. The First Kiss Dispute : After Bernadette refuses to make Howard apologize,

The story of this episode centers on a Halloween conflict and a sentimental revelation between the main characters: : Howard Wolowitz decides to dress up as