The story behind Sheldon Cooper’s black Tron t-shirt that he wears while his sister pays him an uncomfortable visit.
In The Big Bang Theory episode ‘The Pork Chop Indeterminacy' (S01E15), Sheldon Cooper (Jim Parsons) gets a surprise visit from his 'little' twin sister Missy (Courtney Henggeler). She literally breaks into Sheldon's ordered world and creates very quick a mess with her beauty among the nerds.
Her name is a diminutive of a Misses and is probably a subtle hint to the mess she wreaks. The situation in Sheldon’s apartment escalates when he tries to arrange a ‘sexual relationship’ between Missy and Leonard (Johnny Galecki) whereupon she hits him in his balls.
A curious fact is, that Sheldon wears in all these chaotic scenes with Messy the same black t-shirt with a front logo. This graphic scenery is inspired by the SciFi movie TRON (1983) which became later in the 80s also a popular arcade console game. The cult film from the pre-internet era is about a digital virtual world where real gamers drive light cycles in races against each other until only one survives.
The clue is that Sheldon’s T-shirt graphic shows one of these light cycles with a broken pane and a rider who is terrified and helpless about the break in and the mess.
Therefore, the scenery on his shirt describes perfectly the miserable situation Sheldon has to face with his sister Missy in this episode.
Furthermore the t-shirt is created by fashion brand AmesBros and named “Damn 2.0” which is another nice subtle hint, that this is going to be a bad situation for Sheldon.
I don’t know if you’ve already spotted this media reference but I think it’s a nice little fact, that shows again, the deeper meaning of Sheldon’s t-shirt.