: Steven Molaro, David Goetsch, Tara Hernandez, Jim Reynolds, Steve Holland, and Maria Ferrari The Big Bang Theory: The Expedition Approximation - IMDb
: While in the tunnels, Sheldon struggles with claustrophobia and the lack of proper bathroom facilities.
The title of The Big Bang Theory Season 8, Episode 6 is . It originally aired on October 20, 2014. Episode Plot Highlights
: Despite their scientific ambitions, the simulation only lasts 11 minutes before Sheldon flees in terror after spotting rats, leaving Raj behind.
: 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.
: 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.