Ep 14. The Financial Permeability

Leonard and Penny have been officially dating for a few weeks now, and things are starting to get serious. Leonard wants to take their relationship to the next level and move in together. However, when he tells his roommates about his plans, they start to worry about their own living situations. Sheldon is afraid of change and doesn't want to have to find a new roommate, Howard is worried about losing his current living arrangement, and Raj doesn't want to be left alone.

Meanwhile, Sheldon realizes that he's been spending a lot of money lately and realizes that he needs to create a budget to keep his spending in check. However, he quickly gets overwhelmed by the process and turns to Penny for help. Penny, being the practical one, takes Sheldon's finances into her own hands and becomes his financial advisor.

As Penny tries to help Sheldon save money, she realizes that his roommates could also benefit from her financial expertise. She takes it upon herself to create individual budgets for each of them, but quickly learns that their spending habits are a lot worse than she anticipated.

The boys struggle to adjust to their new budgets and start to realize just how much money they were wasting before. Howard, in particular, has a hard time cutting back on his spending, as he's used to splurging on expensive collectibles and electronics. Sheldon, on the other hand, is able to stick to his budget with ease, but is so focused on saving money that he starts to become a bit of a cheapskate.

As tensions rise between the roommates over their new financial situation, Leonard and Penny's relationship is put to the test. Leonard starts to worry that moving in together might be a mistake if he can't provide for them financially, while Penny begins to feel stressed out by taking on everyone's financial problems. In the end, the group realizes that living together is about more than just money, and they find a way to make it work.

The Financial Permeability is a hilarious episode that explores the difficulties of budgeting, money management, and living with roommates. With plenty of laughs and heartwarming moments, this episode is a must-see for fans of The Big Bang Theory.