. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "2014-10-20"^^ . . . . . . . . . "The Expedition Approximation"@en . . . . "8"^^ . "6"^^ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Amy hugging Sheldon before he descends into the tunnel."@en . . . . "Raj and Sheldon test themselves to see if they can handle an underground scientific expedition; and Leonard and Penny worry about money in their marriage."@en . . . . "Raj and Sheldon test themselves to see if they can handle an underground scientific expedition; and Leonard and Penny worry about money in their marriage."@en . . . . . . . . . . . "Season 9"@en . . . . . . "Season 7"@en . . . . . . . . "The Expedition Approximation"@en . . . .