Ep 7. The Geology Methodology

Sheldon is determined to prove his theory on dark matter, but he needs data to back it up. He recruits Raj and Howard to help him collect the necessary data by conducting experiments in a mineshaft. Meanwhile, Bernadette and Penny decide to take a spa day together, but their relaxation is interrupted when they receive a call from their husbands in the middle of their important experiment. Back in the mineshaft, Sheldon, Raj, and Howard run into some unexpected obstacles, causing tensions to rise and putting their friendship to the test. Despite the challenges, they are committed to finishing the experiment and proving Sheldon's theory, even if it means working through the night. As the episode comes to a close, the group must face the consequences of their actions and decide how they will move forward as friends and colleagues.