The Big Bang Theory/The Vacation Solution
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The Vacation Solution is the sixteenth episode of the fifth season of The Big Bang Theory, and the one hundred third 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 (Amy Farrah Fowler), Melissa Rauch (Bernadette Rostenkowski)
Co-Starring: Nick Clifford (Phil)