I ought to know, I was married to a man very much like Sheldon (although Sheldon is a non-sexual) for 20 years. My husband was also exceptionally brilliant and accomplished in a number of ways, but conversely lacking social finesse and empathy, almost like a very mild idiot savant. He was just as difficult to talk to as Sheldon is.
So being the "Sheldon" that I am, I noticed in last weeks episode, which was a repeat, that the comic store counter had a QR Code sticker on it. I held my phone up to the tv and was taken to Welcome to the official website of The Comic Center of Pasadena which is the website of the store on the show. Pretty clever I thought.