Big Bang Theory Quote
Howard: (Howard joins Sheldon walking down the corridor) Hello.
Sheldon: Hello.
Howard: I see you are dressed as Doc Brown from Back to the Future. May I assume that Amy is going as his wife, Clara Clayton, from Back to the Future Part III?
Sheldon: She is.
Sheldon: (Sheldon stares at Howard) Did you do something different to your hair?
Howard: Yes.
Sheldon: Looking good.
(and walked off without realising Howard is dressing up as him)
Quote from S12E06 - The Imitation Perturbation