The Big Bang Theory/The Weekend Vortex
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The Weekend Vortex is the nineteenth episode of the fifth season of The Big Bang Theory, and the one hundred sixth 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)