Simon Helberg
Howard Wolowitz
Howard Wolowitz
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Johnny Galecki
Leonard Hofstadter
Leonard Hofstadter
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Kunal Nayyar
Rajesh Koothrappali
Raj Koothrappali
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Kaley Cuoco
Penny
Penny
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Jim Parsons
Sheldon Cooper
Sheldon Cooper
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| Name | The Einstein Approximation |
| Season | 3 |
| Episode Number | 14 |
| Type | Regular Episode |
| Is Pilot | False |
| Air Date | Feb. 1, 2010 |