The Big Bang Theory: 21 Easter Eggs You Probably Missed
12. The Flash Wears Sheldon Shirts
Sheldon's t-shirts are somewhat legendary among the show's fans, with the vast majority of his wardrobe ending up on fan sites across the world available to buy. One of his most iconic items of clothing is the red shirt with the flash logo.
And it seems that people have really taken The Big Bang Theory to heart, with The CW's The Flash paying homage back to The Big Bang Theory with the Cisco Ramon character wearing a Sheldon Cooper-inspired t-shirt in response.