Howard arrives at work dressed as Sheldon, mimicking his "spot" and bathroom schedule. Hurt by the ridicule, Sheldon and Amy retaliate at Leonard and Penny’s party by dressing as Howard and Bernadette. Amy’s "spot-on" high-pitched impression of Bernadette is a highlight, though it causes genuine friction between the couples.
Leonard's Inspector Gadget propeller was originally so long it hit people on set, requiring the wardrobe team to cut it down several times for balance. [S12E6] The Imitation Perturbation
Anu's U.S. Constitution costume featured the Bill of Rights on the back, which the costume designer researched at the National Archives website to ensure accuracy. Howard arrives at work dressed as Sheldon, mimicking
The storyline was loosely based on a real event where a writer for The Big Bang Theory was parodied by a colleague while working on Malcolm in the Middle . Leonard's Inspector Gadget propeller was originally so long