The Big Bang Theory (2007-2008)

The Tangerine Factor

The Tangerine Factor picture
The cast and producers from the show The Big Bang Theory. (Photo: CBS)

Episode 18 of Season 1 (2007-2008)
Originally aired May 19, 2008

When Leonard finally works up the courage to ask Penny out on a date, they each turn to Sheldon for advice.

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