![The Big Bang Theory Season 3 Episode 15 The Big Bang Theory Season 3 Episode 15](https://image.tmdb.org/t/p/w185/j64iUb52W2IYE9qV9pLi5tFq8IE.jpg)
The Big Bang Theory Season 3 Episode 15
Leonard can only bring one guest on a trip to see CERN’s Large Hadron Collider (the world’s largest and highest energy particle accelerator) in Switzerland on Valentine’s Day.
Serie: The Big Bang Theory
Director: Mark Cendrowski