The Big Bang Theory The vacation Solution

"The Vacation Solution" is the sixteenth episode of the fifth season of the TV show "The Big Bang Theory." It originally aired on February 9, 2012.

In this episode, Sheldon Cooper (played by Jim Parsons) decides to take a vacation by applying for a grant to spend three months at the North Pole research station. However, Sheldon's friends Leonard (played by Johnny Galecki), Raj (played by Kunal Nayyar), and Howard (played by Simon Helberg) are not thrilled about the idea of him being away for so long.

Meanwhile, Penny (played by Kaley Cuoco) and Amy (played by Mayim Bialik) plan a girls' weekend while Sheldon is away. They invite Bernadette (played by Melissa Rauch) to join them, but she declines due to her work commitments.

As the departure date approaches, Sheldon becomes anxious about being away from his routine and his friends. He starts to doubt his decision and seeks advice from Leonard, who tries to be supportive but also encourages Sheldon to take the opportunity.

On the day of Sheldon's departure, his friends throw him a farewell party. However, just as Sheldon is about to leave, his mother calls and tells him she had a dream that he would be attacked by a polar bear. This leads Sheldon to rethink his plans and ultimately cancel his trip.

In the subplot, Penny realizes that Bernadette declined their invitation because she doesn't like her. This causes tension between the two, but they eventually have a heart-to-heart conversation and resolve their issues.

"The Vacation Solution" explores Sheldon's fear of change and his dependence on routine. It also highlights the dynamic between the main female characters and their efforts to maintain their friendships.