The Big Bang Theory/The Launch Acceleration
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The Launch Acceleration is the twenty-third episode of the fifth season of The Big Bang Theory, and the one hundred tenth 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)
Guest Starring: Casey Sander (Mr. Rostenkowski)