: During their time underground, Raj and Sheldon discuss Star Trek: Voyager , Miley Cyrus, and the logic of Hannah Montana's secret identity. Production Credits Director : Mark Cendrowski
: Sheldon and Raj consider joining a research expedition in an abandoned salt mine to study dark matter. To test their endurance for the harsh, cramped conditions, they spend time in the university's underground steam tunnels. Watch The Big Bang Theory S08E06 HDTV XviD-FUM ...
: Steven Molaro, David Goetsch, Tara Hernandez, Jim Reynolds, Steve Holland, and Maria Ferrari The Big Bang Theory: The Expedition Approximation - IMDb : During their time underground, Raj and Sheldon
: Penny sells the car Leonard previously bought for her because her new pharmaceutical job provides a company vehicle. When she tries to return the money, it leads to an argument about their shifting financial dynamic. : Steven Molaro, David Goetsch, Tara Hernandez, Jim
: Despite their scientific ambitions, the simulation only lasts 11 minutes before Sheldon flees in terror after spotting rats, leaving Raj behind.
: While in the tunnels, Sheldon struggles with claustrophobia and the lack of proper bathroom facilities.