The Big Bang Theory: 10 Moments When Sheldon Cooper Was Wrong

10. Thinking It Would Be A Good Idea To Clean Penny's Apartment In The Middle Of The Night

Episode: The Big Bran Hypothesis In the show's second ever episode, Sheldon is so horrified at the mess in Penny's apartment that he decides to help her out with a little spring cleaning. Unfortunately, he does it in the middle of the night. Without her knowledge. Of course, Sheldon doesn't really undertake this task to please Penny anyway. He does it to relieve his own stress; knowing there is such untidiness across the hall is preventing him from getting his precious sleep. The next morning, he reaches for the low-fibre cereal to celebrate his accomplishment €“ only to be interrupted by the sound of Penny's, err, disapproval. No happy neighbour, no lower stress levels, no Honey Puffs after all. Certainly not the best plan Sheldon's ever come up with, but it's slightly better than the next one...