The Imitation Perturbation | The Big Bang Theory Wiki | Fandom
: 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
: 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. The Imitation Perturbation | The Big Bang Theory