The Pulled Groin Extrapolation
The Big Bang Theory Season 5 Episode 3 (09/29/11)
Recap
Sheldon is obsessed with a toy train he bought.
Leonard goes to a wedding with Amy.
Bernadette spends a weekend living with Howard and his mother.
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Leonard: I know what you are doing. You don't want me going on this research trip because you're afraid to be alone. Sheldon: I'm not afraid to be alone. On ...TBBT Pics