With the new season of The Big Bang Theory well underway, we get to see some of Sheldon’s and Leonard’s new t-shirts. But, we thought we would go back and review some of the more obscure t-shirts worn by two of the shows central characters.
This first t-shirt features the number 73. This design is in reference to “The Alien Parasite Hypothesis” season four, episode 10, in which Sheldon claims that the best number is 73.
“The best number is 73… 73 is the 21st prime number. Its mirror, 37, is the twelfth and its mirror, 21, is the product of multiplying (now hang onto your hats) seven and three… In binary, 73 is a palindrome: 1-0-0-1-0-0-1, which backwards is 1-0-0-1-0-0-1.” Space Sheldon wore this shirt in two subsequent episodes of The Big Bang Theory
Some of Leonard’s T-shirts, such as the one worn way back in season 1, are also obscure. This one features a caffeine molecule. He wore it in season 1, episode 2 “The Big Bran Hypothesis.” Of the two characters, Leonard is certainly the most likely to wear a shirt with a caffeine molecule on it. Sheldon does not drink coffee; at one time he even called it a “gateway drug.” This isn’t the only molecule shirt worn by Leonard Hofstadter. Also in season 1, he wore a paradox molecule shirt, very similar to the one below.
Another of Sheldon Cooper’s interesting t-shirts is the antique radios shirt that he wore in both season 2 and season 4. While it seems like something Raj or Howard may be more interested in, since they are decidedly more mechanically minded that Sheldon, only Dr. Cooper could pull off such a t-shirt.
Note the fashionable pairing of the antique radio shirt with his purple and neon green long sleeve shirt underneath. Sheldon is the epitome of geekdom in this outfit.
In “The Gorrilla Experiment,” season 3, episode 10, Sheldon embraces his inner hipster with an odd little American Apparel shirt:
This one admittedly looks a bit like playground equipment, and has no significance to anything in the show. It is simply a fatal fashion faux pas committed by Sheldon.
And finally, here is another simply fun t-shirt worn by Leonard in two different episodes during season 2.
It is of a retro Japanese robot, and does not have any significance to the show other than it helps support the character’s likes and personality.
The costumes for Leonard Hofstadter and Sheldon Cooper are certainly interesting and hopefully this has answered some of the questions you have had concerning the more obscure t-shirts from The Big Bang Theory.