The Big Bang Theory
Thursdays 8:00 PM on CBSWhere's that information been this whole time?
Penny: Wait a minute, you mention his birthday and he vanishes?
Leonard: Where's that information been this whole time?
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- Episode:
- The Big Bang Theory Season 9 Episode 17: "The Celebration Experimentation"
- Show:
- The Big Bang Theory
- Related Quotes:
- The Big Bang Theory Season 9 Episode 17 Quotes, TBBT Quotes
- Added by:
- Ashley Bissette Sumerel
- Added: