Discover
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.
Original Release
02/08/2010
US Release
02/08/2010
Cast
| Name | Character |
|---|
| Johnny Galecki | Leonard Hofstadter |
| Jim Parsons | Sheldon Cooper |
| Kaley Cuoco | Penny |
| Simon Helberg | Howard Wolowitz |
| Kunal Nayyar | Raj Koothrappali / Rajesh Koothrappali |
| Erin Pickett | Cafeteria Patron |
| Lisa Randall | Extra |
Directors
Writers
Richard Rosenstock, Maria Ferrari, Jim Reynolds, Lee Aronsohn, Chuck Lorre, Steven Molaro
Creators
Cast
| Name | Character |
|---|
| Johnny Galecki | Leonard Hofstadter |
| Jim Parsons | Sheldon Cooper |
| Kaley Cuoco | Penny |
| Simon Helberg | Howard Wolowitz |
| Kunal Nayyar | Raj Koothrappali / Rajesh Koothrappali |
| Erin Pickett | Cafeteria Patron |
| Lisa Randall | Extra |
Producers
| Name | Role |
|---|
| Lee Aronsohn | Executive Producer |
| Steven Molaro | Executive Producer |
| Chuck Lorre | Executive Producer |
| David Goetsch | Executive Producer |
| Eric Kaplan | Executive Producer |
| Bill Prady | Executive Producer |
| Kristy Cecil | Producer |
| Mona Garcea | Producer |
| Brian George | Producer |
| Steve Holland | Producer |
| Kelly Lee | Producer |
| Faye Oshima Belyeu | Producer |
| Mary T. Quigley | Producer |
| Jim Reynolds | Producer |
| Richard Rosenstock | Producer |
| Peter Chakos | Producer |
