Episode Title: The Large Hadron Collision
Date Aired: 07 February 2010
When Leonard must travel to Switzerland on Valentine’s Day to visit the CERN laboratory, Sheldon uses any and all means to be his guest instead of Penny.
Available Episodes: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
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