# S3-Scientific Breakthroughs

By [Big Bang Theory Fans](https://dylit.info/user/bigbangtheoryfans)

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Episode 15: The Large Hadron Collision Leonard is invited to travel to CERN to see the Large Hadron Collider and must choose between taking Sheldon, who feels scientifically entitled, or Penny, who expects to go as his girlfriend. Sheldon’s escalating campaign to secure the ticket culminates in a spectacularly petty meltdown, while Leonard’s attempt to balance romance and friendship literally gets derailed by a snowstorm.