The Big Bang Theory/The Bon Voyage Reaction
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The Bon Voyage Reaction is the twenty-fourth episode of the sixth season of The Big Bang Theory, and the one hundred thirty-fifth episode overall.
Starring: Johnny Galecki (Dr. Leonard Hofstadter), Jim Parsons (Dr. Sheldon Cooper), Kaley Cuoco (Penny), Simon Helberg (Howard Wolowitz), Kunal Nayyar (Dr. Rajesh "Raj" Koothrappali), Mayim Bialik (Dr. Amy Farrah Fowler), Melissa Rauch (Dr. Bernadette Rostenkowski-Wolowitz)
Guest Starring: Kate Micucci (Lucy)