"You had a mustache in my heart," Missy replies.
On screen: a younger, bow-tied Sheldon stands before a whiteboard full of entropy equations. He pauses mid-sentence, squints at someone off-camera, and says: "If you're recording this for nefarious purposes, please be aware that the MPEG-2 compression algorithm will irreversibly alter the chroma subsampling of my demonstration."
Missy snatches the DVD. "Can we watch it? I wanna see you bomb."
Sheldon Cooper, age 13, sits at his spot at the kitchen table. In front of him: a knockoff DVD labeled in Sharpie: "Sheldon – S04E08 – The Great Explosion." The handwriting is Mary’s.
"I need to draw a cat. With a mustache. It’s for science."