: Penny sells the car Leonard previously bought for her because her new pharmaceutical job provides a company car. When she tries to give Leonard the money back, it leads to a debate about financial independence and gender roles. They seek advice from Howard and Bernadette, only to find that the couple has their own deep-seated issues regarding Bernadette’s higher salary and Howard’s "stipend" for household chores. Key Details Director : Mark Cendrowski.
: Johnny Galecki (Leonard), Jim Parsons (Sheldon), Kaley Cuoco (Penny), Simon Helberg (Howard), Kunal Nayyar (Raj), Mayim Bialik (Amy), and Melissa Rauch (Bernadette). [S8E6] The Expedition Approximation
: Sheldon and Raj consider joining a research team in a salt mine to detect dark matter. To see if they can handle the claustrophobic and harsh conditions, they decide to spend time in the university's underground steam tunnels as a simulation. During their stay, Raj shares personal stories, but the "expedition" ends abruptly after just 11 minutes when a family of rats scares Sheldon into fleeing and abandoning Raj. : Penny sells the car Leonard previously bought