About this programme
15/23. Leonard is invited to visit the Large Hadron Collider in Switzerland and asks Penny to join him as a Valentine's Day treat. However, Sheldon tries to persuade the couple to allow him to take her place.
Cast and crew
Cast
- Leonard Hofstadter
- Johnny Galecki
- Sheldon Cooper
- Jim Parsons
- Penny
- Kaley Cuoco
- Howard Wolowitz
- Simon Helberg
- Raj Koothrappali
- Kunal Nayyar
- Restaurant patron
- Erin Pickett
Crew
- Director
- Mark Cendrowski
- Writer
- Maria Ferrari
- Writer
- Jim Reynolds
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