: 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.
The title of The Big Bang Theory Season 8, Episode 6 is . It originally aired on October 20, 2014. Episode Plot Highlights Watch The Big Bang Theory S08E06 HDTV XviD-FUM ...
: Despite their scientific ambitions, the simulation only lasts 11 minutes before Sheldon flees in terror after spotting rats, leaving Raj behind. : Sheldon and Raj consider joining a research
: While in the tunnels, Sheldon struggles with claustrophobia and the lack of proper bathroom facilities. It originally aired on October 20, 2014
: 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 Reynolds, Steve Holland, and Maria Ferrari The Big Bang Theory: The Expedition Approximation - IMDb